RCA 25" TV Dead After Power Outage

Sep 06, 2011 3 Replies
G

Gentlemen,



I have a 25" RCA TV, model #F25651BL / Chassis #CTC177AG. After a power outage due to a thunderstorm, my set is now completely dead. It was plugged in but not on at the time. I don't hear the usual "power up" sound when I plug it in. The fuse checked OK and nothing looks like it's been burnt or overheated. I suspect an open somewhere in the power supply, but as I have neither the tools or knowledge to go further, I'm taking it in for service. What do you think the problem might be? Could a power surge have damaged something?



Thanks! Greg



Vote
Twitter Facebook LinkedIn
M

Yup.

Live Fast Die Young, Leave A Pretty Corpse
Vote
Twitter Facebook LinkedIn
A

Assuming it uses a switch-mode power supply, it is very common for them to fail this way after a power outage. Normally, they are never powered off, and in standby mode, the idling part of the PSU that keeps the system control micro and infra red receiver going, is self powering. However, after a loss of power, that little circuit has to restart. Over the years, startup resistors tend to go high or open, and also small low voltage electrolytics on the PSU primary side go high ESR or open. This will result in the standby supply failing to restart, giving a dead set symptom. Of course, if there was a thunderstorm about, it could be something a lot more serious, but chances are it's a simple front end power supply problem on any set more than a few years old.

Arfa

Vote
Twitter Facebook LinkedIn
J

wer

in

se

e
o

ter

tup

cs

dby

Check the MOV ,,,next to the plug-in also the 5 watt resistor next to it.

Vote
Twitter Facebook LinkedIn

Join the Discussion

Have something to add? Share your thoughts — no account required.

Didn't find your answer?

Ask the community — no account required