Question about NEC Televison & Video
Your description of the problem indicates that there is intermittent fault with the backlight circuit and components of the screen. Open and verify the devices and circuits that are associated with generating light from the device end towards the source of driving circuit. The fault may be detected lying in between, as a loose connection or dry joint. Device failure will hardly give an fault that occurs intermittently but a loose connection, dry solder joint or temporary partial shorting of circuits by some loose and strayed conductive substance.
Posted on Feb 20, 2012
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Posted on Jan 02, 2017
SOURCE: Horizontal lines on NEC plasma
Intermittent horizontal deflection
Resoldered the pins of horizontal deflection transformer
Picture is horizontally narrowed and deformed
Capacitor C2913 (390nF, 250V) on the deflector PCB had lost capacity
Geometric distortion, Pillow, and picture enlarged horizontaly
The problem was a short from GND to pin 11 inside IC301 (TDA8350Q). This pin is the output of amplifier for geometric correction signal. Replace IC301
Posted on Nov 26, 2007
SOURCE: NEC PX-42VM3A 42" Power problem
I have read that this has been fixed with little more than a hard reset. This means just unplug your set for 10 minutes or so and let all the power seep out of the boards and capacitors, then plug it back it.
If that didn't fix it, your unit needs servicing. If you are handy here are some troubleshooting steps:
Check the fuse at Y-Sustainer pcb.
If blown do not replace. Look instead at scan converter boards. They are connected between y-sus & plugs from display (left side with face down, back open). Look for signs of 'burning' at upper and lower long boards. If any imperfections are found, replace all three boards: Y-sus, up & low scan.
If fuse was okay, check power supply for bloated capacitors (big board in middle of set).
I hope that helps.
Posted on Apr 19, 2010
double check that there is no interverance from the lead (try adiverent lead iv not check or get somwhone to check the internal connections that they are not lose or dirty other wise proceser board us
Posted on Jun 12, 2010
have almost the same problem left side is black with sometime blue line red lines or a whole bunch of different lines some one help please have sound and right side of tv works fine
Posted on Sep 26, 2010
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