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Re: Faulty (video) ram
Posted: Sat May 25, 2024 2:23 pm
by fuasn
so finally,
after replacing IC6 with another "new" from ebay (the one i got was obviously faulty too), i brought one QL back:
Thank you all SO MUCH for help & support !
best
manfred
Re: Faulty (video) ram
Posted: Sat May 25, 2024 2:32 pm
by Pr0f
Nice one
Re: Faulty (video) ram
Posted: Sat May 25, 2024 4:52 pm
by Popopo
Chris_68 wrote: Sat May 25, 2024 10:27 am
I think what popopop suggested was to measure with IC in place so you have connection from pad to top of IC, this to verify there is good contact in socket.
That's it!
Thank you, lately it is hard to express myself
Re: Faulty (video) ram
Posted: Sat May 25, 2024 4:54 pm
by Popopo
fuasn wrote: Sat May 25, 2024 2:23 pm
so finally,
after replacing IC6 with another "new" from ebay (the one i got was obviously faulty too), i brought one QL back:
Congrats!!
Really happy for you that got solved it.
Re: Faulty (video) ram
Posted: Sat May 25, 2024 5:32 pm
by Chris_68
Hi, Really happy for you!!
What was the problem apart from bad IC6?
Re: Faulty (video) ram
Posted: Sat May 25, 2024 6:23 pm
by fuasn
i'm not really sure what was the problem after replacing ram1 (which i think definitely also was faulty). Maybe i had that self-made issue with 2 legs in 1 socket-slot of the 257 too long. Also the fact you can't trust any of these ram chips from ebay didn't make it easier, in the end the chip in IC6 was also bad.
For everyone trying to solve such things, i REALLY recommend using Minerva ROM, at least once you get the video ram working (which is the "upper" bank).