Hello LCs enthusiasts!
I recently get one of my LC475 unit out of storage in order to fix it and sell it. (Need to make some space )
Unfortunately, despite everything seems fine, the video output is missing HSync.
I'll poke around a working 475 and the defective unit to try to find the problem, but if anyone as some info about the video generation or schematics of this motherboard, it'll be very helpful.
I didn't found anything useful on this matter so far. :/
I recently get one of my LC475 unit out of storage in order to fix it and sell it. (Need to make some space )
Unfortunately, despite everything seems fine, the video output is missing HSync.
- PRAM battery is good
- I used a VGA adapter with DIP switches to force the video mode (so I can expect particulars readings)
- There is RGB signals and the VSync signal is a strong, stable and clean 66Hz (totally what I expected), checked with an oscilloscope.
- Motherboard and PSU fully cleaned and recapped. No broken trace found.
I'll poke around a working 475 and the defective unit to try to find the problem, but if anyone as some info about the video generation or schematics of this motherboard, it'll be very helpful.
I didn't found anything useful on this matter so far. :/
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