1200 sound and floppy woes

[r6stu]

My A1200 as lost all sound and I am unable to load from floppy.

If I stick a disc in the floppy drive the light comes on and dfo:? comes on WB and thats it. If I take the disc out the light stays on!

It was working one day and not the next.

I do have a spare 1200 mobo if needed, however the PCMCIA slot as a few broken pins.

Is it an easy task to unsolder the PCMCIA slot and stick a  new one in?

My A1200 is my pride an joy and is in new condition!!  

[Ryu]

It could well be that its your PSU at fault.... the sound and floppy both need -12v.

[Stevo]

Sounds more like Paula is b0rked, as "Paula performs two main functions in the Amiga. Primarily it provides the Amiga's native audio which is 4 channel 8 bit sound, but it also functions as the floppy drive controller." -The Big Book of Amiga Hardware

[r6stu]

OH well! Looks like a mobo is needed then as they are surface mounted chips.

How about unsoldering the pcmcia slot and replacing?

Stevo wrote:
Sounds more like Paula is b0rked, as "Paula performs two main functions in the Amiga. Primarily it provides the Amiga's native audio which is 4 channel 8 bit sound, but it also functions as the floppy drive controller." -The Big Book of Amiga Hardware

[r6stu]

Sorted it!

It seems to be the power supply!

It is one of the goliath PSU's. Is it simple enough to take it apart and stick a new PC supply in there??

Or what could be going on for that to happen?

[Trooper]

You could always get an old PC AT power supply (Don`t know if it will work with an ATX supply though) and rewire the a1200 power connector to the AT power supply. Thats what i did when my power supply didn`t have enough nuts to power an external cdrom and an apollo 040 25mhz accelerator and died.

Trooper

[lurkist]

No-one has mentioned that this also sounds like a dead floppy drive (except for the sound thing).  Instead of swapping mobos, or getting bogged down in PSU issues, try swapping floppy drives first.

[Lando]

I think Ryu's right -  sounds like the motherboard isn't getting -12v.  I hade the same symptoms with an Eyetech tower I had years ago but one of their tech support guys helped me fix it.

-12v is the middle pin on the square PSU connector - maybe the pin has been pushed back inside the connector and isn't making contact when you plug it in.

[r6stu]

Thanks guys I will take a look at the wires. However now the CD rom dosent work.


It says CD0 as been mounted but no icon appears and I cant list it from DOPUS??

I have tried 2 adapters and two zappos neither work!

(I have now got 3.1 roms and OS3.1)

I dont know if thats to do with all my mods and a std psu but the cdrom as an external psu, so surley that shoukdnt matter!

I have tried a network card and that lights up, the cd ejects (It dosent unless connected to the miggy!) and all pins are ok!!


Its all happerning at once!!