centris 660av

[imactheknife]

picked up a centris 660av and cleaned and recapped. On first turn on, chime, got mouse, display, flashing folder. Now it will give me chime (sometimes not full) a display, but no mouse, no flashing question mark etc. Is this. to do with Rom Simm, or something on logic board? any ideas? nice little unit..

 

[joshc]

Are any SCSI devices connected?

 

[imactheknife]

After initial turn on and saw flashing folder i shut off. I plugged in scsi cdrom to see if it would boot from cd. It didnt give me the chance to try.

 

[imactheknife]

Ok, well she turns on, mouse comes up then will freeze after 15 seconds or so. Flashing question mark is there too. One chip I noticed smells like shorting or hot?? It did have some writing on it when i bought it untested. The vls1 gets warm and smells. It is right by where the rom simm socket is on this board. Would that cause mouse to freeze up? This picture is of the same chip, but different board. I pulled roms off of this one

 

[imactheknife]

Ok, well she turns on, mouse comes up then will freeze after 15 seconds or so. Flashing question mark is there too. One chip I noticed smells like shorting or hot?? It did have some writing on it when i bought it untested.

 

[imactheknife]

Ok. Well board worked perfect then for some strange reason a short happened and stated a tantalum on fire. After removing it I noticed that heat burnt solder mask right down to copper. The via that was shorting is now shorting with the ground plane or exposed copper. What a mess. Got it covered up and no shorting, but board is dead. What else to look for if something shorted? Kept blowing the capacitor.

 

[Unknown_K]

When you have a short in the middle of multi-layer boards you are pretty much screwed. Ages ago I purchased an AM3 motherboard that had a blown chip on it since it looked like an easy fix. I replaced that part, and the board came alive but the part I replaced got very hot very fast because there was a short somewhere inside the board layers and would blow the new part again.

 

[joshc]

It sounds a bit cursed, probably easier to find a different 660av board to work on to be honest.