CE Tech Tips — September 2022
**NOTICE**
Due to the danger and complexity of electronic equipment repair, the following technical tip is intended for professional reference only. Please refer to manufacturer’s recommendations as Encompass does not guarantee the accuracy, reliability or safety of this information.
Insignia TV, NS-LCD47HD-09
Reason for Service: No video, B/Ls okay.
Solution: Replacing U507 on main board fixed the set (was running very hot).
LG TV, 42LG50
Reason for Service: Picture solarized.
Solution: Found and replaced bad U21 on T-Con Bd. AS15F.
LG TV, 50PJ350-UB
Reason for Service: Set starts for a second then shuts off.
Solution: Check/replace R927 & R929, both 22Ω/5W.
Protron TV, PLTV-32CM
Reason for Service: Audio volume low and distorted.
Solution: Replacing two bad caps on main fixed set. CE6 and CE7, 100uF/16V.
RCA TV, RLDED5078A-D
Reason for Service: No video or OSD.
Solution: Replaced open fuse on T-Con, 3A.
Samsung LN-T2342H
Reason for Service: Dead set.
Solution: Found bad zener in power supply, DZB803.
Sylvania TV, 6432TFY
Reason for Service: Dead set, may chirp.
Solution: Found bad D653; replaced, 18V zener.
Vizio TV, E420VA
Reason for Service: Dead set.
Solution: Replaced small blue cap in power supply, C911, .01uF/1KV and F901, 5A fuse.
Vizio, VW42L
Reason for Service: Backlights strobing and making buzzing noise.
Solution: Replaced C421 in power supply and two 470mF/35V on master and slave inverter boards.
