SEGA Master System with No Display - Can I FIX it ?

Hi, here we have a Sega Master System (the 1st version) that was purchased faulty on eBay. The fault is no display on the TV when using either RF or AV. What could be the cause and can it be fixed. Let's find out.
GadgetUK164 video on the Sega Master System (really useful fault finding and information)
• Sega Master System Rep...
Merch is here!!!!! www.puddlt.com...
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If you have an interesting 'non returnable' item for a 'trying to fix' video then my PO box is:
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WATFORD
WD18 1HT
UK
Remember that this is just for entertainment and I am not an expert in these repairs. The processes in the video may not be the best way, the correct way or the safest way to fix these things. I do love fault finding and trying to fix broken things, so I hope that comes across in this 'Trying to FIX' series. Many thanks, Vince.