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16 December 2011, 23:30
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#1 |
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Help! One of my a1200s died!
Help! One of my miggys is dead. Floppy disk goes crazy then funny noise / graphics ensue. Vids attached... Any ideas?
[ Show youtube player ] [ Show youtube player ] |
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17 December 2011, 00:09
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#2 |
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Join Date: Apr 2010
Location: Italy
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remove expansion
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17 December 2011, 02:00
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#3 |
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Thanks for advice. Expansion removed, same issue :-(
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17 December 2011, 09:36
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#4 |
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Location: birmingham
Age: 55
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have you tried re-seating the roms
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17 December 2011, 12:29
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#5 |
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I checked they were pushed in properly. Might it help completely removing and replacing them then?
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17 December 2011, 12:36
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#6 |
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Join Date: May 2001
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Try another power supply.
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17 December 2011, 12:38
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#7 | |
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Quote:
you could try that,plus have you got another internal disk drive to see if its that? and can you get into the early startup? Last edited by roy bates; 17 December 2011 at 12:49. |
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17 December 2011, 13:03
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#8 |
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Thanks guys. Have tried different psu, reseating roms, disconnecting disk drive. It never gets to the insert disk screen, it won't boot from its hdd when plugged in. I am now thinking either it's the psu connection to the motherboard, the roms being fried, or some caps. Or it's just utterly dead.
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17 December 2011, 13:04
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#9 |
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Early startup appears to be a no.
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17 December 2011, 13:06
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#10 |
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can you try it with nothing connected at all?
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17 December 2011, 13:19
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#11 |
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Ooh orange screen. Let's see if it's repeatable...
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17 December 2011, 13:20
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#12 |
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Nope. Black again now. No early startup or kickstart screen.
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17 December 2011, 13:28
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#13 |
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Location: birmingham
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can you try the roms out of another 1200,just to see what happens.
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17 December 2011, 14:18
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#14 |
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Thanks Roy. Did the swap, exactly the same wired shorting disk drove sound, no kickstart screen. On the bright side the busted machine has working 3.1 roms... Left with caps, CPU, power connector :-(
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17 December 2011, 16:33
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#15 |
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hi again,can you power it up and leave it on for about 10 minutes then see if any of the chips get overly hot to touch.
and do this with nothing attached and it has to be around 10-15 minutes(not even the floppy just the motherboard with roms) also can you see if the green power led is full on and not dim please. and while you are doing this take turns pushing down on each chip while its on(use your thumb)but not loads of pressure,and do it on a flat surface to see if you have dry joints(this is quiet common due to age) Last edited by roy bates; 17 December 2011 at 16:39. |
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17 December 2011, 16:47
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#16 |
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Ok power led appears same as my other 1200 which I switched on to check. So bright, I guess. It's now on and waiting... Interestingly the floppy light came on intermittently so whatever weirdness makes the floppy go mad on startup happens without it. Will report back at 4.
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17 December 2011, 16:52
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#17 |
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remember firm pressure,but not enough to bend the pcb an a flat surface.
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17 December 2011, 16:58
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#18 |
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Ok still goes mad floppy light after. Left to right - 3 big square chips warm, middle big square not so much, Rom chips slightly warm, 020 warm. None really hot. This after 10 mins or just over.
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17 December 2011, 16:59
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#19 |
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Still on. Warmest chip front left big square
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17 December 2011, 17:03
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#20 |
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Location: birmingham
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ok can you connect to the tv via cvbs? and not rgb.
did you push on any of the chips? |
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