How do I detect a melted via?

[badknowledge]

I've been trying to diagnose a V4 board that no longer works after attempting an install.. I did the install, turned the system on and black screened.. then checked and double-checked everything.. black screen.. So then I removed the chip completely by desoldering all points on the board. However, the PS2 still will not boot up and stays at the black screen..

so I checked for pin bridges, stray solder bits, all fuses which I could find, and still couldn't find the problem. So not knowing exactly how to proceed, I thought I should check that the VIAs are still okay..

What is the symptom of a melted VIA? Will I just have no continuity on the VIA point? Should I check for continuity between the dvd controller points and the corresponding points on the bottom of the board?

Thanks!

[charlie_ps2]

Suspect vias last. It's much more likely to be a bridge or solder ball.

I don't recall if the v4 is multi-layer or just top/bottom. If it's top/bottom then melting the via is no big deal as it merely goes back to the CD/DVD controller. You can certainly trace continuity back to the legs of the C/DVD C.

I always advise people - don't solder to the vias but not everyone takes that advice.

[drongo22]

I have the same problem on a V4, with magnifier and pin to pin continuity test on every IC on board still black screen..All fuses check out good, I spent 5+ hours checking the damn board lol. I am suspecting a component, the thing is the PS2 was working fine booting all backups for a week before it died.

PR