Why would an ultrasonic cleaner KILL a board

[xboxhaxorz]

I had a mainboard that worked and booted no problem but was filthy to increase the life of the board i tossed it in my UC and upon taking it out it would not boot

I have revived water damaged boards in my UC before, so for it to be a life saver and a killer puzzles me

Thoughts??

[budm]

Re: Why would an ultrasonic cleaner KILL a board

May be the MLCC (Multi Layer Ceramic Capacitor) cracked and shorted out?

[999999999]

Re: Why would an ultrasonic cleaner KILL a board

What exactly does it do when you attempt to power it on? Where in the boot process does it fail?

Does it beep? Does it keep fans spinning and PSU running? Does it post at all?

Have you tried it out on a desk with only bare minimum components installed that are needed to make it boot?

Have you checked that the battery has enough voltage and tried clearing CMOS?

If all the above look ok, I would suspect either a cracked solder joint or ESD damage, possibly only corrupting the bios (EPROM) contents if you're lucky and have a way to reflash it.