Hello - I have a Performa200 that upon start up does as shown in pik (I've stolen this pik from elsewhere but looks exactly the same but the guys there didn't have a solution) 
The boards is: 820-0326-B it has two SHARP chips in U22 (341-0257)and U23 (341-0261) marked as "128k & 256k" in DIL skts and had 2 memory simms installed (HYM594000M).
In the fault finding process I have removed, cleaned and replaced all the above chips but the fault continues, so I have removed the chips (all of above) disconnected any drives (floppy and HD) checked the power supply (5V) and still the fault persisits. So the guess is there is a fault on the main board. There is no battery installed or goop spillage, all the caps look OK, the fuses seem intact, the two reset buttons seem in order too.
I'm out of ideas! Suggestions please!
The boards is: 820-0326-B it has two SHARP chips in U22 (341-0257)and U23 (341-0261) marked as "128k & 256k" in DIL skts and had 2 memory simms installed (HYM594000M).
In the fault finding process I have removed, cleaned and replaced all the above chips but the fault continues, so I have removed the chips (all of above) disconnected any drives (floppy and HD) checked the power supply (5V) and still the fault persisits. So the guess is there is a fault on the main board. There is no battery installed or goop spillage, all the caps look OK, the fuses seem intact, the two reset buttons seem in order too.
I'm out of ideas! Suggestions please!