A1200 booting but nothing displayed?

[r_varlese]

Hi,
I feel its time to repair my poor old amiga.  When i boot-up the amiga nothing displays on the screen.  It responses to key functions (quick reboot with amiga keys) and I’ve tried both the RF and s-video out connections and still nothing, is it possible that both of these are dead? If so how easy is it to fix?

Cheers

Ross

[r_varlese]

Homer wrote:
3. What sort of screen are you using ? Are you sure it works ?
Another idea, does anybody know if an A500 external rf modulator module works on the back of an A1200 ? If so it may give you another chance if the internal RF is fried.
Good luck :-)

Im using just a normal PAL TV, which is fine on my A500 and A600.  I tried the A520 modulator and still no joy.

I don't own a RGB to Scart cable and couldn't find one that would fit in the back of the Amiga (23 Pin right?) - i did see the plans to make them, which is quite tempting.  Do you think its worth trying an RGB to VGA adaptor?

[r_varlese]

I’ve tried several things now, and the only thing that seems to be producing any results is when the A520 is plugged in as the TV is receiving a signal, although nothing to get excited about.

I tried the “EarlySartup” but nothing really seems to happen – apart from the floppy drive light is on continually.  I tried a cold start and the light is still on and I now have a completely white screen??

Gonna see if swapping the floppy drive has any effect as im slowly running out of ideas.

[r_varlese]

BUT before I do swap the floppy…

Heres what happens under the following circumstances:

Connected to built in RF
No signal on TV and floppy drive light on continually

Connected to A520 RF
Screen blank, flickers and floppy drive light on continually

Connected to Composite out
Blank screen, but actually sounds like its booting up correctly with the floppy light coming on to check for a disk and then off again.

I’ve tried loading a disk but the floppy drive refuses to access the disk. Not looking good really.
 :-?

[r_varlese]

Yup the PSU works, tried and tested with A500 and A600.  Ive swapped the floppy drive over with a known working one and still it refuses to read the disks. I'm goning to completely strip the A1200 to see if I can spot anything obivous. But first, some food and maybe a strong srink is require.  Thanks for you help guys.