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#1 |
crusader of light
Join Date: Jul 2002
Location: Stone, Staffordshire.
Posts: 1,151
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Dead and dying!
![]() This one is a completely standard Commodore A1200 i have not altered in any way (unlike my others ![]() Is this problem terminal?? ![]() |
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#2 |
Commodore Collector
Join Date: Aug 2001
Location: Austria
Age: 53
Posts: 944
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Maybe the psu dying ? The standard A-1200 psu is very weak and it is saver to use a A-500 psu which is stronger.
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#3 |
crusader of light
Join Date: Jul 2002
Location: Stone, Staffordshire.
Posts: 1,151
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Im using a modified 300w PC psu now and still getting the same problem
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#4 |
Powered by Motorola
Join Date: Feb 2002
Location: Redondo Beach, CA
Age: 52
Posts: 1,065
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If I remember correctly, this is a sign of an overheating Alice chip.
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#5 |
crusader of light
Join Date: Jul 2002
Location: Stone, Staffordshire.
Posts: 1,151
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Baring in mind i dont have any a1200s I particularly want to use for spares can anyone sugest a solution for this problem please??
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#6 |
Registered User
Join Date: May 2001
Location: ?
Posts: 19,656
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Try running it with the case open and check for Alice overheating. It shouldn't be overheating, but if it is, a quick, temporary fix could be heatsinking the bitch. Most probably, if you do this, you won't be able to close teh case back, though!
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#7 |
Registered User
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for a better quick fix, use some heat transfer compound and fix a small aluminium block (I've seen it done with coins and steel washers) to alice, put some more on top of it and put the original shielding back on (if you still have it), then to can use the entire metal sheilding as a heatsink
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#8 |
crusader of light
Join Date: Jul 2002
Location: Stone, Staffordshire.
Posts: 1,151
|
Have done this and it seems to be working ok now but after about an hour or so still gets the same problems
![]() This "was" the a1200 I wanted to tower up but it looks like im gonna have to root around for another one ![]() |
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#9 |
Junior Member
Join Date: Jan 2002
Location: Australia
Age: 45
Posts: 381
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Sounds like the guys here are right about the heating problem ( didn't know that the 1200 had heating problems .. learn something new everyday! ) try mounting one of those low profile fans on the heatsink, that should provide it with more cooling than just a heatsink, hopefully enough so that the problem does not come back.
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#10 |
Junior Member
Join Date: Jan 2002
Location: PDX
Age: 62
Posts: 2,396
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Another thing that you could check for is to see if that chip is mounted in a socket vs. being soldered to the motherboard. If it's in a PLCC socket, these are notorious for working the chip seated into it loose and will cause problems, look for the A500 Agnus chip problem for solutions if this is the case. Perhaps just a complete removal then check for any problems like bent/broken pins and/or contacts then look for any burnt marks on the chip and motherboard. Clean this area if neccessary with compressed air etc...
As Miggy mentioned try a slim line fan, i.e., the kind for 1U server cases work really well. Also some older 486/Pentium fans will sometimes work too ![]() |
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#11 | |
Junior Member
Join Date: Jan 2002
Location: Australia
Age: 45
Posts: 381
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Quote:
Each time the socketing problem is mentioned I find myself digressing about the "Atari twist" story. so here goes ![]() ![]() |
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