Disaster! (i think)

[diablothe2nd]

I just removed my fastata (i'm not using it anyway as it's been such a problem for so long now).

when replacing my rom chips, In a moment of either not having enough coffee or not paying attention (or both!) I put the rom chips in the left side of the sockets and not the right side!

as soon as i saw it didn't boot (maybe 3 seconds) i killed the power and touched the rom chips and they were pretty darn hot!

so after much cursing and slapping of forehead i dug out my spare 3.0 roms and plugged them in (the correct way) and my miggy still doesn't boot

have I just fried another 1200 mobo?

even worse, have I just fried everything connected to it too? (Bppc, indi aga)

[Retrofan]

Was any other chip hot? I think you've just fried your kickstarts.

Edit: Oh, youve tried with your spare ones... (surely I didn't take my coffee either).

[diablothe2nd]

Originally Posted by Retrofan

Was any other chip hot? I think you've just fried your kickstarts.

everything was a little warm as it was running only 5 mins before i took the fastata out.

like i said, i tried my 3.0 roms and still wont boot

[johnim]

you may have just killed the roms and mobo but the rest should be ok

I see you have other systems just test in them

[diablothe2nd]

if i've killed my bppc i'm gunna cry

*sigh* guess i need to look for another mobo then

edit, no i dont have other systems (just a dead 1200 mobo i'm using in my CD1200 build)

[Retrofan]

Let it running and see what chip gets too hot (if any). I would try booting with a floppy to see if it's working too.

[diablothe2nd]

Originally Posted by Retrofan

Let it running and see what chip gets too hot (if any). I would try booting with a floppy to see if it's working too.

it doesn't get a full green power light, just sits at half bright so something tells me I'm not even gunna get to a kickstart screen let alone boot a disk

[Retrofan]

Take a look at the traces to see if any is bad

[diablothe2nd]

Originally Posted by Retrofan

Take a look at the traces to see if any is bad

traces, caps and resistors all seem fine.

I powered it up and kept it on with nothing connected for a couple of mins.. Alice and the cpu got a little warm (alice was only warm on one side) nothing else got warm at all.. stone cold.

[8bitbubsy]

You may have put VCC to ground or something when the disaster happened, check the area around the PSU connector, and especially the SMD parts near the kickrom slots (resistors, caps - the small ones).

I doubt the damage is big, I'm fairly sure your BPPC is fine. Also make 100% sure you put the working 3.0 ones in the correct chip order, orientation and that they are shifted as they should (check a mobo pic from amiga resource to see how they should be).
Testing the same PSU on another Amiga is also a good idea.

Best of luck to you!

[diablothe2nd]

Originally Posted by 8bitbubsy

I'm fairly sure your BPPC is fine

fairly sure?

[8bitbubsy]

Originally Posted by diablothe2nd

fairly sure?

[roy bates]

your accelorator will be fine,your motherboard on the otherhand is,well its toast.(unless you can get someone with a rework station to swap out some parts.)

i think this is the third amiga killed this way this year so far.

but whatever you do dont bin the motherboard,they are repairable.

[diablothe2nd]

Originally Posted by roy bates

your accelorator will be fine,your motherboard on the otherhand is,well its toast.

i can deal with the motherboard being toast. but yeah I hope whatever happened with the connections going too/from the rom sockets fried before it reached the bppc

I'm currently weighing up some motherboard options through ebay/amibay. got someone offering a 1d4 for £50 delivered. sadly not the 1d1 i'm looking for but it's hard to say how long it'll be until one turns up

[Loedown]

If you plug ROMs in backwards.

You will have burnt out a trace between pins 31 ( mode +5V ) and pin 10 OE ( ground )

The method is Vss is plugged in on pins 11 and 30 which will be internally connected in the ROMs in reverse shorts pins 31 & 10, multimeter out between +5V and pins 31 on each ROM socket, then ground check to pin 10 on each ROM socket, something will be open.

Easy fix.

[diablothe2nd]

i didn't put them in backwards, upsidedown or back to front, i just put them on the wrong side of the rom socket with spare holes on the right instead of the left.

[Loedown]

You will have shorted out something that had +5V on it and something that had ground on the other side via pin 11 & 30, easy as that.

[diablothe2nd]

so will any components be damaged? or are we just looking to find a burnt out track that isn't visibly burnt out?

[roy bates]

possibly both,you know the kickstart roms are dead.

do you have another 1200? i know ,that sounds silly.

i can test all your roms for you.

[diablothe2nd]

yeah i meant any motherboard components aside from the roms.