Author Topic: Help! Amstrad Cpc problem  (Read 974 times)

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Offline Ast

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Help! Amstrad Cpc problem
« on: 23:03, 02 May 17 »
Hi everybody !


I tried to plug my Cpc 6128 (crtc 3-eratz) thaïs afternoon but as you could see there is a big problem.
No basic boot, no bip with del key, just coloured screen!
Who could help me to fix this problem ?
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Offline rpalmer

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Re: Help! Amstrad Cpc problem
« Reply #1 on: 01:11, 03 May 17 »
Ast,

Are you able to replace the Z80? It may have gone to zilog heaven or hell...lol

When even key presses do nothing, it suggests that maybe also the ROM/RAM is not responding and so you may need to check if they are okay.

rpalmer

Offline Ast

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Re: Help! Amstrad Cpc problem
« Reply #2 on: 13:05, 03 May 17 »
Ast,

Are you able to replace the Z80? It may have gone to zilog heaven or hell...lol

When even key presses do nothing, it suggests that maybe also the ROM/RAM is not responding and so you may need to check if they are okay.

rpalmer
Thanks for you reply Ray !
First, I will try to change the z80 and i will tell you what' s happening !
-
For the RAM Check, how CAN i do if my Cpc doesn't switch on ?
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Offline Token

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Re: Help! Amstrad Cpc problem
« Reply #3 on: 13:13, 03 May 17 »
Hi Ast, bad luck indeed. Check the RAM chips, if they are getting hot then it will require new chips.

Offline Bryce

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Re: Help! Amstrad Cpc problem
« Reply #4 on: 13:19, 03 May 17 »
It's not the Z80. To get that square on the screen the Z80 needs to have successfully retrieved commands from the ROM and sent them to the CRTC, so the CRTC, ROM and Z80 are all ok. Most likely there's a problem with RAM. If your ROM is socketed or you have a Lower ROM Board of some sort, then @gerald wrote a rather nice RAM checking ROM routine which you can use to find out which RAM has died.

Bryce.

Offline rpalmer

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Re: Help! Amstrad Cpc problem
« Reply #5 on: 14:19, 03 May 17 »
you are right bryce, I forgot about that.... lesson learned  :D

rpalmer

Offline Ast

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Re: Help! Amstrad Cpc problem
« Reply #6 on: 14:39, 03 May 17 »
Hi Ast, bad luck indeed. Check the RAM chips, if they are getting hot then it will require new chips.
Hi everybody,


RAM are cold ! So ???
Is it possible that eratz died ?
I tried to plug an xmem but all symptôms are the same!!
« Last Edit: 14:41, 03 May 17 by Ast »
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Offline Bryce

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Re: Help! Amstrad Cpc problem
« Reply #7 on: 16:10, 03 May 17 »
The x-mem can replace the lower ROM can't it? Try installing the RAM Test ROM from @gerald and see what it reports. Broken RAMs don't always get hot, they can be completely cold and still broken.

Bryce.

Offline gerald

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Re: Help! Amstrad Cpc problem
« Reply #8 on: 19:05, 03 May 17 »
The RAM test is in this thread : http://www.cpcwiki.eu/forum/amstrad-cpc-hardware/quick-and-dirty-ram-test-for-cpc
You have to program it as a low rom on an xmem then boot on it, so you need a other CPC to do this.

Offline keropi

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Re: Help! Amstrad Cpc problem
« Reply #9 on: 20:12, 03 May 17 »
my plus had dead ram and gave a similar screen:





just do what Bryce says, check/replace ram and chances are the problem will go away

Offline Ast

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Re: Help! Amstrad Cpc problem
« Reply #10 on: 20:58, 03 May 17 »
The RAM test is in this thread : http://www.cpcwiki.eu/forum/amstrad-cpc-hardware/quick-and-dirty-ram-test-for-cpc
You have to program it as a low rom on an xmem then boot on it, so you need a other CPC to do this.
I think the best thing to do would be to send it to you... because, i don't Know anything in electronic !!
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Offline gerald

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Re: Help! Amstrad Cpc problem
« Reply #11 on: 21:49, 03 May 17 »
I think the best thing to do would be to send it to you... because, i don't Know anything in electronic !!
PM to follow  ;)

Offline Ast

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Re: Help! Amstrad Cpc problem
« Reply #12 on: 00:50, 04 May 17 »
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