Hi, This model has some design flaws and yes NEC admitted to them a year ago. The problem with your monitor (hopefully) is a bad power supply. Have a Tech with a voltage tool check the boards as well as the connections Reason, this monitor generates a lot of heat ( no cooling fans) primarily at the power supply and sits there. So the wires tend to go weak by the heat build up. What the problem is the power is not going to the correct board in the right voltage. hope this helps out!!!
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Your video input on VIDEO 2 via the RCA jack is most likely composite analog signal (good old obsolete NTSC), and the Television may be in High-Def mode, therefore not looking for, and not understanding anything but an HDTV (digital, ATSC) signal.
Hi - first check that all the fans are rotating - the set will shut down if they are not. ***** WARNING potentially FATAL voltages (up to 400V DC) exist on the
PSU boards - if you don't know exactly what you are doing don't !
******* Unfortunatly the fault could be on a) PSU b) CPU board, as this monitors the PSU voltages and will shut down the set if the measured voltages are wrong c) plasma drive circuits - if these are drawing excessive current, or someother fault exists the fault feedback signal to the CPU board will activate and the set will again shut off. Check the PSU voltages, the standby power must be OK otherwise the set wouldn't work at all !. The +5V switches on first followed by the +70V and +170V (about 1-2 secs delay.)
If the 70 and 170 dont come up try removing (with the power DISCONNECTED) the two large double row connectors on the PSU board near the 70/170 V test points - these supply the plasma drive circuits - the set will still switch off as there is a fault feedback line from the drivers, but it should stay on long enough to check the voltages.
According to the manual for "POWER/STANDBY indicator is blinking in red":
"The temperature inside the main unit has become too high and has activated the protector."
"Promptly switch off the power of the main unit ans wait until the internal temperature drops."
"If the monitor becomes too hot, the overheat protector will be activated and the monitor will be turned off. If this happens, turn off the power to the monitor and unplug the power cord. If the room where the monitor is installed is particularly hot, move the monitor to a cooler location and wait for the monitor to cool for 60 minutes."
Hi Gemma - have a look at this forum - it may be similar to what you are experiencing.
Things don't look good for NEC owners I must say!