I have a Polaroid 40gsr3000 40 in lcd tv. sound works no picture. think maybe inverter board. One board in middle of back .one long strip board that runs along bottom of tv. Is this inverter board?

SOURCE: polaroid flm 323b no power

FLM-323B same problem, black screen. Checked out the power board and there is no 24v on it. Took the board out, let it cool off, put it back in. Got my TV back for a while, checked for 24v and it is there. Worked for a few weeks, now it's out again. Known issue with Polaroid, and if it's out of warranty, might as well throw it away because they WILL NOT help you. Personally this was my first and LAST POLAROID TV ever, TOTAL JUNK.

SOURCE: flm-3201

Sounds like the back light is out, and the unit needs servicing. You can check this by shining a flashlight close to the surface, and if some image is seen, the the back light is the cause. Else the LCD driver is gone.

SOURCE: polaroid lcd tv sound only no picture

Hello dougie49

I would first check the back-light and the inverter. usually these are what causes the problems in LCD displays. If the inverter is bad most likely the back-light will have problems. If you need to replace the back-light 9 time out of 10 you will require a new display element.

I hope this helps

Thank you,

Henry A. McKelvey

SOURCE: I have a NS-LCD37-09 tv. No picture or backlight

Your main board is faulty. I've done several of these but haven't been able to figure out which component is actually bad these yet. I've simply had to replace the board itself, and it fixes it every time. One thing you can do to get your backlights to come on (and so you know I'm not Jive'n you) Is unplug the three wire bundle that spans from power supply to main board. This will usually make the backlights fire up. I even had one that after I left it that way for a minute (with the backlight on) it suddenly started working again! But this was short lived. :-(
One time I even tried recapping the entire main to see it that would fix it. It did not. I think it might be something to do with the small chip labeled SL37HA37. It's a 16 legged bastard near the 3-wire plug I told you to pull. It's that or possibly the bigger IC near it that has a heat sink on it. The ball grid array solder joints may be faulty. Just guesses, if any smart guys out there figure this one out, be sure to tell the rest of us please!
Thanks, Chris Boise LCD www.boiselcd.com

SOURCE: I have Toshiba 15

There are a few things that can cause this fault, but the most common is the High Voltage Capacitors that feed the backlights going bad. The invertor and power supply are on the same board (Vestel 17IPS01-2)

The caps are on the power supply board and are C355 & C356 (12pf 3kv) and C354 (4.7pf 3kv). If you replace these caps it will solve the problem in 99% of cases.

If replacing these three caps do not solve the problem then it may be easier to replace the power supply board... as fixing means replacing a tiny surface mount chip with loads of legs.

WARNING: The Power Supply/Invertor board can contain LETHAL VOLTAGES even when turned off and unplugged. if you are not sure, Pay someone to do it for you!