Triads Posted March 24, 2013 Share Posted March 24, 2013 I have an old ST2 that bombs out when powered on. Most of the time its 3 bombs, sometimes 2, then sometimes looks like the bombs never end.. Ive reseated everything, from TOS to video shifter, every chip that was removable was taken out.. Removed the floppy, had no KB attached and still have the same outcome. Any suggestions on where to look next? I guess I could try swapping chips with my ST4, but only as a last resort. Triads Quote Link to comment Share on other sites More sharing options...
atarian63 Posted March 24, 2013 Share Posted March 24, 2013 (edited) power supply? they do get old and do have cap problems Edited March 24, 2013 by atarian63 Quote Link to comment Share on other sites More sharing options...
Triads Posted March 24, 2013 Author Share Posted March 24, 2013 Havent done anything with the p/s.. Guess this means i'll have to open the ST4 anyway.. I'll see if anyone has any other suggestions first before i open the other system Quote Link to comment Share on other sites More sharing options...
GadgetUK Posted March 24, 2013 Share Posted March 24, 2013 Things I would check in order:- 1) Does it need re-capping? Check the PSU, are there any caps with bulging tops - it's 90% chance you need to change the capacitors in it. I've seen the symptoms you are getting many many times in the ST, Mega and STe and its nearly always capacitors that have lost electrolyte. 2) If you've got more than 1Mb of RAM, try removing some of the memory - I don't know if the Mega uses SIMMS or not? Ideally if you had 1 x 1Mb SIMM, you could take 2 out and retest it. If it still doesn't work properly, swap the 2 SIMMS still in there and re-try. If you've got onboard DRAM chips it's quite a bit of pain as you would need to socket them all and replace each chip... A painful experience i've had to do on an Amiga 500 recently =| I think it's very likely the PSU. Quote Link to comment Share on other sites More sharing options...
Triads Posted March 24, 2013 Author Share Posted March 24, 2013 The memory chips are soldered in.. Ive looked at the psu and the caps look fine.. guess i'll open the st4 and do some swaps.. i'll post results soon.. thanks for the help guys Quote Link to comment Share on other sites More sharing options...
Triads Posted March 24, 2013 Author Share Posted March 24, 2013 Ok, swapped the PSU, video shifter, etc.. Still the same.. Wonder if this is worth repairing. If anyone still repairs these things Quote Link to comment Share on other sites More sharing options...
GadgetUK Posted March 24, 2013 Share Posted March 24, 2013 I could probably repair a RAM fault, its the postage on these things thats the killer. Quote Link to comment Share on other sites More sharing options...
GadgetUK Posted March 24, 2013 Share Posted March 24, 2013 (edited) Run that Xtra ram memory tester if you can - see what that reports. Edited March 24, 2013 by GadgetUK Quote Link to comment Share on other sites More sharing options...
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