Sounds like backlight problem. Contact any experienced service technician. Those blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit section inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power LED, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating procedure, to many popular brand TVs and other devices. http://electronicshelponline.blogspot.com/
Blinking codes details of many popular brand TVs are given. Surf the site with patience. If blinks continue without any pause, the main board is faulty.
View the site by desktop or webview on mobile devices to see the "search box". Type in the brand name of your set in search box; to get gathered the related posts.
SOURCE: Acer AL511 15" I need advice in repairing this
Ok so what is your question exactly, I do not see a question in there?
SOURCE: I replaced the main board in my sony Kdl-32S300.
B+ over voltage protection (OVP), unit goes to the standby mode then
displays the 3 blink fault. This is also a problem in the power
supply circuit, check T603 and R672.
Have you set the output voltage correctly?
SOURCE: When plugged in, Sony Bravia
Check BL_ERR pin on back light inverter board, what is volt reading that you get before and after tv shuts down? Let me know to proceed.
Thanks.
BTW, I really enjoyed your quote * I don't trust the blinking anymore *
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SOURCE: panasonic TC-42PX14 wont turn on power light flashes 1 time
You may want to shop for that board or at least consider removal of the HDMI socket in question---tested for shorts there I presume?
SOURCE: Vizio 42 in L42HDTV10A no power no lights no nothing
You can look at the various module failure symptoms and service / replacement options for the L42HDTV10A here:
http://www.coppelltvrepair.com/search?Q=l42hdtv10a&As=false&Pf=&Pt=&Sid=false&btnsearch=Search
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