I made an easy tutorial for the cap problem. If you are not comfortable doing the work yourself other people have had Radio Shack do the it (very cheap and without shipping).
I feel that we are all in the same situation, if we had the money to get it fixed professionaly we wouldn't be on the internet searching out a solution.
check out this link. http://www.fixya.com/support/r741402-polaroid_flm_373b_lcd_tv_black_screen
if you have any problems please email me I will try my best to help you out for FREE!
It seems that the manufacturer of the Polaroid FLM-373b and other models of HDTV either used the wrong parts or there is a design problem. I found someone on the internet who said they replaced two capacitors on the power board and it started working just fine. I took the power board out of mine and sure enough the two caps with the 10v markings were swelled. I replaced them with two 25v caps and it is working just fine. All the other caps on the power board were 16v and above. So, I would assume they were shipped the wrong parts or they just put the wrong caps in to begin with. If you want to send me your power board I will fix it for $50.00 plus shipping.
send inquires to: mott414@@yahoo.com (remove second @)
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Fault with the main power supply regulator board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/
There is a post by Stivo on this board that has helped many fix this type of problem. There are two capacitors on the power supply board that go bad and if replaced can fix this problem . The parts can be purchased at your local Radio Shack for about five dollars or less. I just did it today and it worked!!!
It can be the main board or the power supply,
look at the power supply first since it is easier to get to, look for burnt parts, bad capacitors, etc. http://en.wikipedia.org/wiki/Capacitor_plague Please post back what you find
Have you ssen the back light lit up? If not, the power supply may have problem. If it has back light, then the suspection are the main board, T-con and inverter. Those boards need checked to find out exact defective board.
We have a bunch of 23" LG units that all failed with the flashing green light problem. I opened it up and traced it to a bad 3.4v output on the power supply which was caused by a puffed up capacitor on the board. If you are capable, you can do the repair and they have all worked fine since. BTW, they ran 24h a day for 2 years before this happened.
I have the same problem. I finally convinced JVC's tech support to help me out (they **** by the way) and I got the schematics for all the boards in the unit. From looking at them I believe it is the Digital Signal Board. I will post results soon.
I am not expert but before you go to a lot of trouble, read all of the post on the infamous "red cloud", "red blob" and "blue streaking". In evey case, it appeared that the light engine was the problem. We just had our light engine replaced and the TV looks perfect. We dealt only with Hitachis Customer Relations Department 800-654-7013. You will have to have a certified tech come out and diagnos the problem. Hitachi will then call and verify, with the dealer, that the problem is a defective light engine and will send out a brand new one.
We were told the part cost around $1500 (Hitachi covers that) however, they will ask you to pay for the install. Our install cost $400. Worth is to us as we paid $3600 for this set 3+ years ago and we have loved this TV. When you first call Hitchi, they will act like they've never heard of this problem but they will give you names of certified techs in your area. Once the tech confirms that it's the light engine, Hitachi will own up to the problem and send out the part.
You really should only deal with Customer Relations ( I listed their 800 number above as you will be chasing your tail so to speak with their regular customer service department. Good Luck!
The tv got a heat sensor, the only way to fix tv , if you are a tv tech, is to buy a bottle of "freez it" spray small sections of tv in side. It will be clearly where the fault is if you spray correct part that give trouble. Replace that part and Tv will be Ok.