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Panasonic Viera TH-58PZ700U TV Questions & Answers
TH58PZ700U
Hellocheck its power supply regulator board for any loose solderings.This is the picture of the power regulator board to your tv. Normally there is no repair for this board, and if it is found faulty, card base replacement can be done. If there is some loose soldering contacts, it can be resoldered by applying a little more solder. that is all. OK.
Wont power up led flashes 7 times
If this is an LG TV this is down to the power supply within your TV, this needs to be replaced - you should contact your screen manufacturer for more advice.
Tv will not turn on.
I would try a power drain. Unplug the TV's power cable so it is not grounded to the house. Then press and hold the TV's own power button in for one minute to drain the capacitors. Plug the TV back in and see if it makes a difference. If not, I would say the problem is with the mainboard of the TV. A dead power supply wouldn't allow the TV to even attempt a power on.
What board should I change
Three blinks of the power LED indicates an over-current or over-voltage condition in one of the DC supplies of the AP board. The AP board is repairable. Therefore the use of an ohmmeter and peak-hold-voltmeter is required to determine the cause of the shutdown. An over-voltage condition is definitely a defect of the AP board. An over-current condition may be due to a short circuit located in the AP board, A board, or the LCD panel.
Panasonic Viera tc-p65s2 - 7 blinks, won't turn on
I had the same problem with my Viera. if you disconnect the power and ribbon cable from the YSUS board (check youtube for how), the light led will blink 6 times, indicating the YSUS is bad. Check ebay for TNPA5175 board (about $115-160). The pop is one of the DG402RP chips burnout. These are about $4, but only available from China. If you can wait a month for delivery, you can solder the new one to replace the bad one. You may want to purchase several in case more are bad or it happens again.
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