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Title: Amstrad CPC 464 no power at all
Post by: pabloingreece on 05:41, 07 August 18

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!

Title: Re: Amstrad CPC 464 no power at all
Post by: Duke on 05:51, 07 August 18

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).

Title: Re: Amstrad CPC 464 no power at all
Post by: pabloingreece on 08:20, 07 August 18

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!

Title: Re: Amstrad CPC 464 no power at all
Post by: Vyper68 on 09:13, 07 August 18

Quote from: pabloingreece on 08:20, 07 August 18
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.

Title: Re: Amstrad CPC 464 no power at all
Post by: pabloingreece on 20:14, 07 August 18

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 (http://www.cpcwiki.eu/forum/index.php?action=profile;u=1624) and @Vyper68 (http://www.cpcwiki.eu/forum/index.php?action=profile;u=2440)

Title: Re: Amstrad CPC 464 no power at all
Post by: pabloingreece on 19:55, 09 August 18

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.

Title: Re: Amstrad CPC 464 no power at all
Post by: gerald on 20:28, 09 August 18

Quote from: pabloingreece on 19:55, 09 August 18
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.

Title: Re: Amstrad CPC 464 no power at all
Post by: rpalmer on 21:37, 09 August 18

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

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General Category => Amstrad CPC hardware => Topic started by: pabloingreece on 05:41, 07 August 18