SOURCE: im looking for the mainboard for a westinghouse
Hello, please email me at [email protected] or [email protected] for price and availability on the main board. Include the model#, serial#, and TW#, all located on the back of the unit. If we don't have the main board we will find one for you and let you know where you can purchase one.
SOURCE: Westinghouse HDTV TX42F430S, No picture or sound.
Tries websites Shopjimmy.com,Ebay.com to buy a refurbish Main Tuner signal board for the replacement.
Testimonial: "Thanks for the lead on the parts."
I will give you some information to read, decide from it what to try and if Any questions please ask first.
ISSUES:
1. IF sound main fuse/s are good.
2. If no power or standby check main fuse, standby power supply and any signsof damage you can see---burnt parts etc.
3. almost all these sets the troubleshooting involves checking voltages on the main power board to narrow down theproblem.
4. Be safe and if you do not know what you are doing don't open the set.
Answers to issues:
1. RE:fuses---if a blown fuse is found get a good replacement(not the genericones like Radio Shack). Many fuses are special even aside from amperage--Don'tput a higher rated amperage fuse in the set for any reason.
2. RE: power supply in set: if total dead aside from main fuse the set uses astandby power supply that runs 7/24 and a main supply (some are combined andsome not.
Here aside from checking fuses you want to examine all the filter caps on thepower/standby to see if any are puffed up or buldged up in some fashion--Iattach a photo of a good one---top should be silver metal and PERFECTLY flatand have no brown material coming out on top or bottom.
What happens in the standby area is they use caps with too low a voltage rating(saves money) which causes them to fail in a year or two---the standby runs7/24 and the heat dries out the caps and they fail.
3. Trouble shooting consists of the above and then at some point you have tobuy and try a board to see if it fixes it or not.
4. Safety first--no TV set is worth getting injured or even killed over.
First thing to look for if set opened is the power supply board--any caps puffed up like these are bad and will stop set from coming on--other things can do this--this is a clear place to look first.
SOURCE: I have a Westinghouse 42
My Westinghouse TX 42F430S has the same symptoms! Researching this issue reveals the 47" models uses the same boards and has the same problems. It seems that these problems could be related because if the power supply fails or is failing (brownouts, unplugging TV while running, etc.) then the file system on the main board could become corrupted...remember these sets are programmed to flash/write data under certain circumstances so it's possible they can SELF CORRUPT under a set of circumstances the designers didn't plan on!!! These are essentially computers with processors CPUs and GPUs just like your desktop/laptop computers.
IF your TV shows an amber standby light, displays a white W for a few seconds when the light turns blue, then goes back to black with the amber standby light, that is a good sign that most of the TV is functioning, but not functioning properly.
Most of the fixes have involved a series of trials and errors, some that work and some that partially work, and some that don't fix anything. Just assuming that the board that you bought off eBay is a working board is a bad assumption...it could be a board taken from a non-working unit with the same problem that you're trying to fix or it could be a board with a different problem that you insert into your own problem TV.
First and foremost, you must start with a working power supply board...get one from a TV repair shop that warrants that they took it from a TV with a broken display panel so you are assured that it will power up all of the TV's other boards like the GPU, inverter, etc. Or you can repair or have yours repaired so you know it will power the TV.
Once you put that good power supply into the TV you can go to the next step to see if that fixed your problem. If it did, you're lucky and should consider buying lottery tickets...just kidding. If it didn't fix the TV, you can now go to the next step of seeing if the file system is corrupted by re-flashing via the methods posted on the internet. It seems this is a possible crapshoot because you might have the wrong files, didn't name them properly, used an incompatible flash/thumb/USB drive - just to name a few but some people have been successful...here's a link to the "best" information I could find
http://www.avsforum.com/t/851860/official-westinghouse-tx-series-tx-42f430s-tx-47f430s-owners-thread/5880#post_19820830
If you are able to fix the file system errors, your TV should come back to life. If re-flashing doesn't fix the TV, then the problem lies deeper into the hardware - most likely the GPU/MPU control board. Remember we already eliminated the inverter because the TV displayed a white W upon a hard reboot by holding the power switch down for 10 seconds. A swap out with another known good board from a working TV with a busted display panel is again the best option since you know where you are in the diagnostic steps. At this point you have to weigh the costs against your ego because if this doesn't bring your TV back, you probably have no other option but to trash it and/or part it out...just don't sell the parts with unknown problems as working or you'll just make someone else's quest for a working solution, a nightmare.
I'm about to start my repair journey by checking out my power supply board for burnt components, dried out capacitors, etc. I'm really suspecting that the capacitors are the issue since I've seen too many consumer appliances fail because the manufactures placed low temp -hence cheaper- caps in areas where the temps rise above the rated limit for too long of time...had this problem with my oven controller display on a Jenn-Air built-in convection double oven...less than $3 for new caps fixed it right up.
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