If your comfortable doing it and have the test equipment open the back and look for 5 volt standby terminal on the power board, test that and see if you have that voltage there, if you don't replace the power supply board
SOURCE: power light blinks red - tv will not come on
I bought one of these tv's at a thrift store and it had the same problem, orange light blinking and static sound coming out of the speakers, no video at all.
The problem was the power supply board, this power supply has multiple outputs that feed the circuitry, 12V, 24v, 5V.
There was nine electrolitic capacitors I had to replace to fix it, all of them were bulged they are easy to spot, I measure one of them that was supposed to measure 1000uF but measured only 65uF. you can buy these from digikey for about 50 cents each, they need to be rated at 105 deg c and the profile has to be below the heat sink otherwise they will hit the top of the heat sink, the spacing between the leads has to be 5mm so they fit in the pcb. I replaced 3 1000uF/25v, 3 470uF/16v and 3 1000uF/16v and that fixed the problem, I bought this tv broken for 100 bucks fixed it with 6 bucks.
Good luck, don't perform repair if you are not familiar with dangerous AC voltage inside the TV.
SOURCE: The power switch fails to
Unplugging it from the outlet for about an hour to let it reset itself first, if it still does not work then It may be in the safety shutdown mode due to short circuits in the power supply or in the backlight inverter board, you can try disconnecting the power cables to the backlight inverter board to see if you can get the TV to come back on with sound but no pictures.
If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:
Please see my basic troubleshooting guide here:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://s807.photobucket.com/home/budm/allalbums
http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.
SOURCE: SEIKI TV Won't power up
The main power supply regulator board to your TV should be troubleshooted. In most cases, it might need card base replacement.
Testimonial: "I was looking at a picture of the board and noticed it has a fuse box. Could it be that simple? here is a picture of the power supply board. http://www.ebay.com/itm/ws/eBayISAPI.dll?ViewItem&item=200926504694&item=200926504694&vectorid=229466#ht_715wt_1044"
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