Amstrad CPC 464 no power at all

[pabloingreece]

Hi I obtained recently a CPC 464 (short board Z70374 MC0044B), at first using the GT65 monitor the power was ok, red light on but grey screen of death appeared, so I supposed that some RAM chip could be damaged. I take it to my house and connected it again, but now using a 5V power supply (which works correctly for a 6128), the 464 is not working at all, no power.


I checked the switch and it's ok, but I can't understand why it's not being powered correctly. I don't have anymore the GT65 monitor. I have a MP-2 unit and again, it's not working at all.


Any clues in how to start? Thanks!

[Duke]

Maybe the DC socket needs to be resoldered, I have seen those go loose on the PCB before.
And try to bypass the switch with a jumper, just to be sure (it may have resistance).

[pabloingreece]

Hey Duke, thanks! I checked the socket and seems tha the GND track is not making contact, I'll resold the socket this afternoon and give you feedback!


Thanks man!

[Vyper68]

Hey Duke, thanks! I checked the socket and seems tha the GND track is not making contact, I'll resold the socket this afternoon and give you feedback!


Thanks man!

Yeah my old 464 was a short board and had that problem where i decided to put a new one on given they are cheap and I was going to take the old solder off anyway. Worked fine after that.

[pabloingreece]

 Everything OK, after resolder a new DC jack and place a new RAM on IC119 (piggy backed, temporary), the old and beloved CPC 464 is working again!


FYI @Duke and @Vyper68

[pabloingreece]

Just for the record, the RAM IC was totally replaced with a socketed brand new chip, this is the result and the CPC is completely repaired.

[gerald]

Just for the record, the RAM IC was totally replaced with a socketed brand new chip, this is the result and the CPC is completely repaired.

Interesting stars and stripes RAM you've got there 
Never seen one of those before.

[rpalmer]

...ahhh make AMSTRAD great again....LOL