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| LC475 no video output, suddenly |
Posted by: Plasticoat on 2020-11-09 23:57:50
Hi,
yesterday my 475 froze midway through boot process, since then, I’m unable to get any video output.
the bong is strong at startup, however the
converter to vga does not process a signal
to turn on my monitor.
the battery is fine, however I’m stumped,
any ideas please, thanks in advance
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Posted by: MrFahrenheit on 2020-11-10 06:55:30
Has it been recapped ?
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Posted by: Challenger 1983 on 2020-11-10 08:59:56
If you have already recapped the machine try cleaning the board again as sometimes cap goo can get underneath chips and components
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Posted by: Plasticoat on 2020-11-10 22:20:24
Thanks for the advice, I’ll clean the board again, I’ll keep you posted.
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Posted by: Plasticoat on 2020-11-11 22:53:55
Hi again, this LC is fighting all the way !
i cannot reset the pram now, and I’m wondering if it’s become corrupted?
is there any tricks to resetting, the keyboard just is not working. Command option and p, r
on restart, no reply from board.
so I’m left with a 475 that does nothing other than bong.
thanks again
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Posted by: MrFahrenheit on 2020-11-13 11:04:14
The 475 should have a red on board button to reset in case of corruption.
Unplugged, with no battery installed, press and hold down button for 10 full seconds. Wait a minute. Install battery. Wait a minute. Power up.
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Posted by: register on 2020-12-17 09:14:54
Is the VRAM properly seated? It is possible to start a LC 475 with no VRAM installed, resulting in black 1-pixel graphics output. You get a black pixel in a screenshot that was created in such a setup. One possible use is a headless machine that is used as a print server or file server, resulting in a minimum of graphics processing.
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