It's dead Jim (4000D)

[Ronmor]

My 4000D was working fine until I tried plugging a cd rom drive on the IDE cable. When I powered it up I had no workbench screen. So I unplugged the drive and got same thing. I then unplugged the harddrive but no Rom screen.
I tried different Roms, a different power supply and also tried swapping out the small IC chip thats behind the Rom chips, plus tried a different cpu board. What else can I check? :-o

[Ronmor]

Thanks for all the suggestion Argus & Jeff! Now the motherboard is out of the case and setting on my work bench with no cables or daughter board, still no go. I also tried different memory sticks. I thinking that I might of plugged the IDE cable in backward since it isn't keyed, if that was the case which chip would I replace? Any an all suggestion are welcome. :-o
 ps. when I power up I get a gray screen, if I do a reset with the keyboard the screen goes red to gray to red to gray etc.

[Ronmor]

Thanks Mr. D of the Faith, but with the new 3.1 Roms I order from software Hut I get a gray screen with a reset.

[Ronmor]

Thanks dawiper! I might try replacing the CIA chips.

[Ronmor]

Thanks eveyone, I tried all suggestions but I think it is the CIA chip there are two of them is that correct? If I try swapping out a CIA chip which one should I try first?
  ps. I'm pleantly pleased with all the information I got from this site thanks again. :-D

[Ronmor]

Thanks for info. Alx, but the CIA chips on the 4000D are surface mounted (I think) that is why I asked which one should I try first.

[Ronmor]

Thanks Plaz, X-ray & Whabang. I try the hot finger trick, sometime the best trouble shooting tools is common sense!
   Where would a trouble shooter buy CIA chips. I looked at software Hut site but didn't see CIA for the 4000?

  I was thinking wouldn't it be great if everyone that visits this site was in the same room full of Amiga hardware & software. :lol:

[Ronmor]

Thanks again dawiper. I reread that trouble shooting site that explains the colors on the boot screen and which CIA would  be at fault, my problem is the U7/U300 CIA. :-)