I think i'm DONE buying chips from China - Dell Latitude 7300 repair attempt, TPS65988DJ replacement
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- Опубліковано 6 вер 2024
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Dear Sorin. please don't edit/cut the videos, we love watching you removing and soldering the chips
The videos could be timestamped for those who don't want to watch it
I usually try to remove the markings from chips from china using a cotton swab and isopropyl. With a little bit of persistence the markings go away, because apparently it's not cheap to do laser markings and counterfeiters are just too cheap.
I find the highest quality chips and electronics come from Digi-Key Electronics. They do the research to make sure everything is genuine. Been doing business with them for over 31 years.
You are right, but many ICs are not available there
@@user-kr8tp3ko8z Yes you are also correct.
As I think the two chips. They support Thunderbolt, according to the data sheet
The problem could be from the spi flash attached to the chip.
As you know TPS65988 is working with firmware
Really?
There are a firmware inside?
@@eldjoesther643 No, it is connected to my isp flash and there is a firmware in it
👍There are several versions of the "TPS65988" and another "G4". A suitable programmer is required
ur old worplace is haunting u with good repairs that end up being eaven better content. i like it
1) When buying: Fabricated/Refurbished chip: (Someone at the recycling plant is removing chips and making them look like something else) They will be thinner if measured with a vernier gauge because they have to be ground down in order to repainted and re-number them.
2. Paint will come off the chip with isopropyl alcohol.
3. Check the image for the previous positioning mark which has been ground down and painted over.
4.The date will not correspond with the manufacturing date of the computer model. (And will be confusing), this is intentional.
5.Look at the pins
All tin-plated pins that are as bright as "new" must be refurbished. Most of the pins of genuine ICs should be so-called "silver powder pins", which are dark in color but uniform in color.
So pins that are too shiny have been made to look so.
6. The vast majority of chips are now laser marked or printed with a dedicated chip printer. The handwriting is clear, neither conspicuous nor blurred and difficult to erase. The refurbished chips have either the edge of the writing corroded by the cleaning agent and have a "jaggy" feeling, or the printing is blurred, different in shades, misplaced, easy to erase or too conspicuous.
I have a very similar looking laptop,Dell Latitude 3410 .Laptop had a short , lights coming on for only 2-3 seconds,many components getting very hot ,I found the USB type C controller chip CYPD5126-40LOXI was very hot in 2 seconds.I've removed it.Laptop is working perfectly since then ,but no type C port.
Thanks sorin for sharing your experience with us.
No problems with chips from china, because I only buy it from a few approved (by me) sellers. Never had an issue.
Share a list please 🙏
I work in IT and 2 years ago I bought a new Lenovo with usb c charging. After a couple of years it was getting unreliable; sometimes it would not charge when plugging in the connector (poor connection). I decided to buy another new Lenovo a couple of months ago; guess what they have gone back to the traditional power charger (eg no usb c)! usb charging is a bad idea; the complex chips required are not reliable, the connector is not reliable. Why change a standard good design and make things more complex and unreliable? I am really happy to go back to a traditional 19v charger! I also had some fake chips from China; I managed to get my money back. I don't really understand the mentality in China with selling fakes; I recently bought a tfcard usb reader which is made in China; it burned out in a month; the Sandisk tfcard (American) plugged into it is fine; I can't think of any American or Korean ssds or memory that I have ever had that failed; so its definitely the mind set and how they think they can treat customers.
I am afraid they are not going back, because EU is forcing to use USB-C in all devices.
"how hard can be" I love this guy
Maybe there is more problems not only TPS65988 .
Charge battery and test again,if laptop works on battery then maybe won't charge so you need right TPS IC but if laptop doesn't work then problem is elsewhere and TPS IC might be compatible and work fine.
I took on a customer job about 6months ago, replacing a small Ic on 20 or so power delivery boards. Chips supplied by customer. Absolute nightmare of a job. I had to decline continuing on it in the end, customer would not listen to me that the chips supplied were fake. He paid top price for them he said so they can't be fake. Wasted a full week trouble shooting that job. Never again will i fit any chip supplied by a customer.
the problem as see it though Sorin, you buy from a UK supplier but how do you know they aren't buying from China?
of course it's from china, i don't think there are any chips made in UK.
@@orange11squares probably the original one from dell come from china too LOL...
I bought in a very important national store in my country a optical pick up KSS201A for a cd player, on the box you can read "original part" but once you open the box you can see bad quality solder joints, pcb that are not well screwed, connectors that are not firmly seated in the pcb , guess where come fron in reality, yes from china , i remove the electrostatic protection, i put the part on the player an doesn´t work, i put a second hand part and work correctly.
In my experience, Dell laptops (and tablets) don't negotiate higher voltages with generic USB power supplies - they only seem to work with proprietary Dell USB-C PSUs, which (I think) provide the maximum voltage without bothering to negotiate first.
that's not possible ! every USB C PD compliant charger MUST start with 5V vbus and only after negotiation it can switch to higher voltage.
@@robertjung8929 You're right, and I seem to have misremembered - the Dell (Venue 7130) I was thinking of used 19V on a Micro USB connector(!). But I have also seen Dell USB-C devices not negotiate beyond 5V with generic USB power supplies, just as Sorin's did.
when they come shipped in a regular plastic bag with no physical or anti-static protection (or more often shrink wrapped in plastic and stuffed on to white foam) you can be pretty sure they are going to be bad.
Like your Videos , im from germany And you have inspired me a lot . Thanks for your Content
you can open the dispute, just send them video that you have on yt..i did many disputes on aliexpress succesfully
thems the breaks.. but I would still let the seller know and go from there if no joy then leave appropriate feedback -if nothing else to warn others...
I will do the same after one bad experience, got a IC chip voltage regulator from Ch1na looking good as an original, replaced it, but gave me 1.2v instead of 3.3va, after some measurements I could see had low ohms compare to the damaged one. I also saw the IC chip engraving was different for the original. Just wonder why the trouble to make a replica so close to original and waste money that won’t work and later none will buy it. I just later bought it directly from factory. The chip is working, gave me the 3.3 LDO.
I've been fixing laptop motherboards for 20 years (ow, how time goes by) and I buy from China, always, because there's no other place to find chips. You need to find reliable suppliers. All the chips I buy come in the original reel. The trick is not buying from the cheapest sellers. Also watching buyers reviews and photos. If most of the buyers' photos have the chips alone, no wrapping/packaging of any kind, you have a great chance the seller only sells used chips.
BUT anyway those usb -c controllers are not available yet, so they are taken from faulty boards. The chance they are already faulty is great because they are the first to burn on modern motherboards.
I avoid buying USB-C powered laptops for myself, I love the simple chargers, let usb for data only. But I know I'll have no choice in the near future, unfortunately. USC-C sucks big time!
Sadly this is something we can't blame companies for. Customers, reviewers, "influencers"...they've all ask for it and now we have it, like it or not.
This chip is available from mouser, 100% original, of course.
@@modorangeorge4991 I live in Brazil, it's very difficult to buy from Mouser. I tried in the past but stuff didn't pass customs, the payment is a surprise (dollar changes and credit card taxes). Buying from Aliexpress is way easier, I can debit directly from my brazilian bank account without having to buy dollars or use a credit card. And every time I try to buy USB-C controllers, specially for macbooks, it's always used. BTW, they advertise as "New and Tested" but it's BS.
Sorin, they have these chips in stock at Mauser UK. Only 5 pounds.
Mauser or digikey are also local dealers and I usually buy from them!
Don't give up Sorin. 50 percent of the battle is getting a working or even correct IC. They are not fake they are either not programmed correctly or not extracted correctly. It can be time consuming and embarrassing if it doesn't go to plan
I have same issue, i started to buy from element14 or RS components or Mouser. THEY ARE EXPENSIVE , but it works 😂
This is not a Dell 7300 latitude model the mainboard is some newer model
yep, the 7300 has dual memory slots in full view, this doesn't. Looks to be the same base cover, but definitely not same motherboad, I've got one open right in from of me. The difference between say 7390 and 7300 is 7300 has dual ram slots. Looks like ram is likely soldered on this one.
only at minute 4. but in my experience its most likely the pd chip witch got burned cause of cheap usbc powersupply
oh man, didnt think i would be right LOL
3 weeks later, we're doing a video on I don't know what. hahahaha that gave me a good laugh. :D
Bad luck on the faulty chip, I'm surprised that sellers from China are also selling on Ebay... Actually now that you mention it I have also seen a lot of AliExpress sellers also selling on Amazon, which is bad. Now you cannot be sure what kind of quality you're buying online even from Ebay or Amazon...
Except, at least with Amazon, you are pretty sure you can get an easy refund. I always have.
Well even Chinese techs and repairmen complain a lot about being swindled by certain parts sellers.They mention a particular town or district that they say most conterfeit parts originate from but as I use google translate because I don't understand Chinese I cannot discern exactly what they are talking about.What I know is that they complain a lot and out these suppliers online.
Week one, it looks like a duck. Week two, it walks like a duck. Week three, it sounds like a duck week four it's dead and in the oven duck 🤣🤣🤣🤣 served up, and it tastes lovely as for the laptop, no, it is still dead 🤣🤣👍
14:35 Ba' you know what, it's not a Duck ... hahaha
Sometimes it is not really a chip but only an empty shell, with legs. You can open a dispute anyway, you can be lucky and at least get a refund.
How frustrating. It's always hit-or-miss with companies (from all countries) these days. No ethics or integrity anymore.
Not all chips can handle the heat. The same warning they wrote on Ali.
i never had any problem buying chips from china... as long as you know what you are doing b4 soldering those chips. u must bake them first to remove the moisture on the chip. let say 125°C for 5 mins.
this will also prevent the chip from being shocked directly by high temp when soldering like 400~°C
sorin must have killed the chip with those temp he used
Buying stuff from China got quite expensive lately and when you don't get what you ordered it's so annoying! You should name and shame the supplier
Yes. Name shame and punish supplier. 50 lashings.
I bought 5 chips from Ali express, a controller for smps all of them are shorted between Vcc and Gnd, I refunded my money but the problem is that the customer waited for 2 months for nothing
Why you use free postage option for customer job? Every tracked service they offer will arrive under two weeks (10 day is average for "AE standard") and even untracked "AE saver" will came for max one month.
@@gorjy9610 Shipping sometimes is very expensive on Ali express depending on the seller options and certain jobs are very cheap $2 for 5 chips I can’t ship them with $25.
@@ultimateworkshop2000 yes you can... Because not many customers are willing to wait so much time and you will loose customers
@@user-kr8tp3ko8z Yes it depends on the customer and the device you are repairing, for example this smps for a kitchen machine that is sold new for $80, the customer won’t pay $27 for parts in addition to customs and repair service fees, instead he accepts to wait longer, but if you are repairing a $1000 laptop customer can pay $100-$150 no problem
@@ultimateworkshop2000 Only $80 for a new machine! Better off buying a new one.
lov it tanx
Sip 👍
Maybe there is another short causing the chip 2 got how
It's such a shame that faulty chips instead of being trashed like they should have been are being circulated. Not everyone has the facility to film and vouch for their equipment to get a refund.
Yep, getting fed up with chips from China now. Cannot get real 46V32M16 TSSOP ICs anywhere. They're are such a commonly used component on many different older devices. I can't even get genuine alternative chips. It's only a SDRAM IC, I just don't understand why there is so much opposition to repairing stuff (well I do but they don't really need to do this). Manufacturers are missing out on a really large repair market, just to protect their new kit sales figures.
They have them at Mouser.
@@englishrupe01 Thanks, I'll give them a go. I've tried RS and Farnell and their chips fail after an hour of operation. I've always bought them from Farnell in the past any never had any issues. Suddenly I'm getting 100% failure on them wherever I buy them from. I even tried fitting them to a known good device and they still fail after about 1 hour. I've reduced the soldering temp, changed the flux I'm using. Tried cleaning the flux off and not cleaning it off. Replaced the voltage termination regulator, frankly I'm out of ideas and I can only conclude the chips are substandard, maybe rejects left over from a part that is no longer manufactured. However I will try these ones from Mouser, just to cover all angles. Thanks again.
@@radio-ged4626 Cool....let us know back, too. Thanks.
The second largest chip looks sideways placed on the board
You can get working chips from China, I try to stay away from ebay. It's better for refunds but I get better experience with AE. Just avoid cheapest sellers and go with shops that exist for years and don't have 20 digits in their name :)
they should send you chips for free because you have so many subscribers. Than you tell us where we can buy good chipd, "a win / win " situation. Thank you
Buying chips from China is asking for trouble and should only be done as a very last resort. I can't understand why a professional would order these chips from China when they are readily available from both Mouser and Digikey,.
Sorin…i bought chips from China and i grind them open. Guess what…was a piece of plastic with legs, nothing inside 😂
That it is the most common these days.
You just give good idea to spot fakes. Weigh them.
Finding a reliable source for obtaining trustworthy components can also be seen as a technician's competency
Open an account with TI, One, Silabs, etc, and get real parts, not chin junk.. It is that simple. Furthermore, those revision sub-letters are negligible differences... You simply need to order verifiable source components... TI will send you samples, free.
Yes Chinese seller are sometimes scammers or just selling scraps from yunkyards, you will need to buy from different sellers and in bulk.
Hello don't cut how to desolder and solder
place a bad review for others to see that seller is seling a bad chips. ty
He will delete the account and make new one, old tricks
@@user-kr8tp3ko8z and that seller will never have genuine good reviews and will never grow. The reputation is what is the most important thing to discern between bad and good sellers.
Are you sure that chip is faulty ? it is totally fully heated , usually faulty chip is heated only from one corner ?? Maybe something is shortened after the chip is this is why it is heated up ?
i think not because u get different result in voltage with both chips.. if both chips were good u have to have the same results..
We decided China just isn't working out for us either. The wait is too long, the quality is often way below par and the returns process of faulty products is just pointless.
even in china, a lot of local repairs shop buy the same shit, even new chip but defected.. cant do nothing.. they rather take the parts from broken motherboard if needed... if you watch them on utube.. they complained too xD
You’ll be back for more 😅
Its a 50-50 buying from China.
AliExpress has a much better buyer protection plan. The seller does not receive payment until you receive you item.
If there is an issue with your order you have an option to make a video and prove the item is no good
Aliexpress has one of the WORST records in dispute resolution in my experience. They appear to demand the item be returned to the seller before a refund can be issued, which in most western countries is just far too expensive to be cost effective.
Ok, "much better" is an exaggeration. Now that I think of it, I've had a few people give me a hard time trying to return things. But generally I've had much better experience on ali than ebay. But I've been off ebay for quite a while. Ebay take 12% of sales so I support them as little as possible
Aliexpress only 5%
I don't think that was a Mandarin Duck you got from China ;) These sellers that Sorin is buying these chips from. Do they have 95%+ positive reviews? Been in business more than 2 years and does he look at the 1 and 2 star reviews for gotchas?
buy other mother board for that laptop and transfer the chip set or change the motherboard you did it before !
I am with you, Chyna IC's and SSD's, SD-cards etc. are just bad. And those get away with it. Chyna your are producing more crap a day than the whole world in a year.
Why don't you order from digikey or mouser?
Cost
@@jaym5938 The cost of the ship in the video cost 6.24€ on Mouser.
@@jaym5938 The amount of time he spent to de-solder / solder over and over again does not justify to buy cheap crap.
Depends on two factors:
1. The distance from the person living to the shop, if the distance is thousand miles then it is preferrable to buy from China as China shipment is known to be cheap, for example to ship to Indonesia the price is just $1 - $2 while ordering from Digi-Key has at least $45 (the cheapest shipping price).
2. There are many chips that you can only get from China, not from Digi-Key or Mouser.
@@stark_energy I said that because this particular ship was available at good price at digikey. Free order above 50€ and delivery time in 48 hours.
Why did you buy a chip in China and wait three weeks if Mouser Electronics has it in stock? It costs 6.24 € there, what's the point of buying it in China?
Because many chips are not available in mouser
@@user-kr8tp3ko8z When you buy a CPU, GPU, ICH and other unique chips, they can only be obtained in China or from donor boards. But universal USB controllers, power management chips, logic elements and passive components are widely available, why take the risk of buying them in China?
@@mineua as mentioned, there are many chips that are not available in Mouser. Also for repairer living in other countries far from Mouser Electronics, the shipping cost from Aliexpress China versus shipping cost of Mouser or Digi-Key is WAY off different, something like $2 vs $45.
I think it's like people who say they will stop using the internet. Impossible to stay away. We all will continue to buy chips from China. Its like an unstoppable addiction. Dont feel bad about it. The risk of life.
How did the chip came from china in 2 days?
:)
dell battteries kills itself if it has no voltage on the cells.Buying chips from china is a gamble sellers profile and rewievs of buyers is the most important signal.electronic industry needs standardization on chips this laptop repairing job is going to be confused.why they are using type c port to supply power on motherboard?what happened to dc jacks?why we need a burning chip on main power logic before mosfets?
I cant believe you dont wear glasses. I cant barely look at components without glasses
Don't edit or cut down video
bru you cut out best part how you remove chip and solder it again we all love to see that soldering skills :( :( :( :( :( :( i mean on end of video ok its comparison. but when you work naaa dont cut it :)
PLz don't edit the video
Be warned, you buy chips from US or UK they will be potato chips. Just kidding. But where to buy, Taiwan would be a better source though no sales channel, or is there?