Monitor Won’t Turn On - Solved!
Вставка
- Опубліковано 29 чер 2024
- My computer monitor was having issues and not turning on. It turns out that the root cause was a few bad electrolytic capacitors that needed to be replaced. In this video we show how to disassemble and replace these expired components to repair the monitor. This monitor is a HP Compaq LA2405wg but the process should be similar for many other monitors.
Topics and timestamps:
0:00 - Introduction
0:58 - Disassembly
6:24 - Identifying the bad components
7:19 - Desoldering and replacing components
9:53 - Testing the fix
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From the looks of the board, the 3 caps near the 2 you replaced, will also need to be replaced at some point soon too. They look to be bulging as well. They might last a while but will eventually fail sooner than later.
The three electrolytic caps on the right side next to the defective ones (C124 & C125) don't look very healthy anymore, too.
Based on the discoloring PCB there are is a lot of heat/thermal stress. It can help to mount the diodes not flush on the board, but a lifted above it a bit, in the air. This way the leads can act like a small heatspreader / heatsink.