The Sinclair QL Forum

Hi
I have replaced IC 21 today and all is good and now working fine It is a shame that I did not replace it before I ordered the replacement ram but it might come in useful in the future.
I would like to thank all those who have took the time to try and help me I would not have been able to get it ...

Don't worry about the top pin of rom 1 when I removed the rom for checking the leg fell off so I had to do a bodge on it but I am now using the minerva rom.
Here is another pic of the other area.
IMG_20250714_100034.jpg
With IC 21 It was said that this IC21 (very low low probability of faulty one ...

Would it be worth getting some more ram chips first and try piggy back a few chips to maybe save some unsoldering and if that fails which chips would it be worth changing first to try and get the minerva memory check to work.

Bit the bullet and replaced the cpu socket It's booting up as before so I think everything went OK.

I do have a vacuum desolder and a hot air station I am not the best at soldering so fingers crossed it s there anything to watch out for when doing it,

Hi
I have took all the seated chips out and gave them a quick clean a few days ago so today I was going to have another look at the sockets but as I tried to pull the cpu out I have broken the top of the socket so will need to replace that in the next couple of days before I can try anything else.

I do have a eprom programmer but the minerva rom is soldered direct to its adapter board so rather then damaging it trying to swap roms I would have to buy the bits.

I have tried the heat test on the ram none getting hot and found one spare 4164 ram chip I have I tried piggybacking each ram chip but made no difference.

I have not done any work on it as yet and when I got it all the warranty stickers were intact.

Hi
It's funny I am in the process of trying the ram with minerva now
I am getting this screen which looks like it is trying to give a ram error but can't.