Another curbside rescue...

[N2IXK]

Just found a 32" Magnavox 32MF231D/37 on the curb. Really clean condition, and thrown in my truck right before it started raining.

Threw it onto the bench and powered it up. Power LED comes on, and LCD backlights turn on, but no picture and no sound. Found a few bulged and vented capacitors on the SMPS board (big surprise, right?). Ordered some new caps from DigiKey, which should be here early next week.

Figured it was worth $5 in caps to try fixing it, even if I don't really need another set around here. Can always flog it on Craigslist for a few bucks.

[N2IXK]

OK, so put in the 3 caps on the SMPS board, and now both outputs on the SMPS (+24 and +16) are good. Still no pix, though.

Backlight comes up, and 2 SMD leds on the main board light up steady green.
All the lower operating voltages (+12, +5, +3.3, etc.) are derived from the +16 rail via multiple DC/DC converters and regs on the main "scaler" board. What should be a +12V rail is putting out +16V.

Will try substituting an external +12 for further testing. The +12V appears to be derived from +16 by a L5973 buck regulator chip. Chip appears to be internally shorted from Vin to Vout. Will stick one in next parts order.

Couple SMD electrolytics on main board seem a little bulged or are running warm. Will replace.