Crackling sound on my A4000T... who does repairs ??

[darksun9210]

it probably is the caps, but another cause of crackly sound, i had pointed out to me by the good people of this forum, is that maybe your -12V line isn't minus twelve volts anymore?

my old A4000T used to eat PSU's on a yearly basis. it was so fully loaded and be drawing so much current on the 5V line, that the crappy AT type power connectors in the PSU plug (bendy thin bits of copper) would have melted away. new PSU required. just thinking this may have manifested itself in some other symptom...

might be advisable to check with a new PSU. unless of course, you can see leaking gunk comming out of the caps :-D in which case, i'll  shut up :-)

[darksun9210]

@Marcfrick2112

the big hint i got that something was not right was the brown burn marks on the PSU's power connector plugs. after unplugging them and looking inside the plugs, (not the socket on the mainboard, that was ok *phew*), some of the connectors had almost burnt down to thin whispery wire.

my A4000T when i sold it, had a CSPPV060 with CVPPC, 64+16MB ram, digital broadcaster32, AD516, CV64/3D, Vlab Y/C, and an opalvision / hydra ethernet all drawing off the mainboard power supply.

AFAIK, it's still currently serving time dishing up interactive displays at the imperial war museum.

sorry to hijack the thread. :-)