I removed the 3300 mic capacitors from my HP PC motherboard, and set about finding replacements locally. I may as well have moved to the middle of a desert. I won't bore you with the bizarre conversations I had in Tex-Mex.
It has to be said my short term memory is failing me. The caps would be the same as the other ones on the PCB . . . right? White circle to the negative stripe? Not on this HP. I looked in dismay as I realize I'd made an assumption.
This site is unequivocal. Neg to the semicircle of white. The 640 is the opposite on all the others, and I'm not sure about the ones I took out.
Yep, I beat myself up a lot these days.
Capacitor Lab - Types of Capacitors - Radial Electrolytic Capacitors
Can't find any good specific pictures of the actual MB. Pavillion a 640n
Anyone know for sure?