Questions tagged [troubleshooting]

For questions about trying to identify hardware problems.

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15
votes
3answers
506 views

What are the normal signals on a 65C02 in an Apple IIe?

I'm troubleshooting a dead Apple IIe enhanced, and I'm having trouble finding documentation on testing the 65C02 (as opposed to the 6502). Specifically, I've found using a logic probe that pin 6 (...
5
votes
2answers
491 views

CBM PET 2001 garbled screen

I picked up this PET and trying to restore it. Screen is garbeled on boot and stays like that displaying random chars, some of them flashing. Tried to resocket the chips, but it didn't help. I don't ...
4
votes
1answer
170 views

Why is my Macintosh LC 475 playing chimes of death when I install more ram?

I bought an LC 475 for parts and repair on ebay. When it arrived it seemed to work okay but the video was all stripey. After some diagnosing I spotted a rotten trace near the the VRAM simms. I ...
4
votes
2answers
99 views

Amiga 500 WorkBench 1.2 Freezes

When I load the Workbench, it loads normally and I can use the mouse to select and open folders and load programs as expected. What happens is, at random, if I double-click on an icon the icon will ...
4
votes
1answer
284 views

PlayStation 2 Slim with analog A/V output having noise interference issues

I'm having an odd issue with the aforementioned system, the A/V receiver is a RCA STAV-4180 unit, and being from 1996, it's still a great unit. So far, while it's tape output for recording does have ...
2
votes
2answers
421 views

Parity error under DOS

I'm facing a Parity Error problem on my new 486er DOS Retro PC. Every now and then, a running software crashes with a Parity Error output on screen. This happens for different software so I think the ...
1
vote
1answer
342 views

N64 displays dark picture with barely recognisable contours

I'm trying to hook up my EUR N64 to a TV that handles both Composite and RGB SCART alright (A1200, CDTV, Megadrive). The picture is very dark and I can only make out the shapes and contours. There is ...
0
votes
0answers
104 views

Portable 386 that only ever beeps continuously; no video

I've acquired a late-80s portable 386 with builtin LCD in unknown working state. It only ever beeps continuously on boot, with no picture on either the built-in LCD or an external VGA-connected ...