Acer AL1715, Delta ADP-40AF power board

[pedro]

This monitor was heading for landfill, owner re-routed it to me. Case showed signs of a prior (and ROUGH) entry. Described symptoms - "no pic".

Tested, and main (video) board function OK, flashlight showed desktop after logo. No backlight attempt. Ripped open and found Delta board, same as in thread http://www.badcaps.net/forum/showthread.php?t=5447

All 2SC5706's checked OK, no real hotspots, all caps (LTEC) showed no leaks/bulging and ESR's acceptable. No circuit found but similar enough to others which use 4x2SC5707 and two transformers.

Then I spotted the problem - the solder joints on the 6-pin inter-board connector had fracture lines on three of them. I'll attribute it to the previous entry (or the original fault occasioning it), as I'm a *lot* more careful than that. Resoldered, reassembled, now in burn-in.

I'm only posting this to remind people to not over-think fault-finding. I've been doing LCD montors for a while, and other servicing for waay too long, and every so often the fault is trivial but not found following the well-beaten path of experience.