Vizio VX32L Main Board

[302931]

Re: Vizio VX32L Main Board

bud on pins a&b on the power supply connectors I am getting 3.2 on and a is 2.9 the screen is on the switch is weird if you hold for 2 sec it catches , and yes my power board is 0500-057-0240

just a note when the screen is on and I have the 3volts at the power on pin when I turn the on /off switch off the blue screen goes off but the 3volt signal stays on and the white lite on tv stays on as well , so I disconnect power from wall to take the power off . re-plug back in measure 3volts when turned back on but screen does not come on

[budm]

Re: Vizio VX32L Main Board

Well you do have correct command signals (BL-ON and Dimming commands) to turn on the inverters and you also have 24V to run the inverter boards, so if they are all present but the backlights are still not on, then you have problem in the inverter boards.
You should remove the metal shields on the inverter board so you can inspect the caps.
Please upload the pictures of your inverter boards next.
BTW, the power does have to be held for a couple seconds, it is normal to protect accidental turn on if someone accidentally brush on the power switch, same when you turning the TV off.

[302931]

Re: Vizio VX32L Main Board

ok here they are

[budm]

Re: Vizio VX32L Main Board

OK, the filter cap on each board has no sign of bulging top and the white fuses are OK?
http://www.shopjimmy.com/catalogsear...?q=Vizio+VX32L
Pictures provided by shopjimmy.

[302931]

Re: Vizio VX32L Main Board

no bulging and the white fuse on each board is good

[budm]

Re: Vizio VX32L Main Board

OK, so the conclusion at this point is that you do have 24VDC, and Command signals at 'A' and 'B' pins but still no backlights, if that is correct then the inverter boards are bad, what exactly failed I do not know at this point.
They are < $5 each at shopjimmy.

[302931]

Re: Vizio VX32L Main Board

thing is I plugged back in fought to get it turned on and once on blue tube is on , when turning on kept going back and forth from white lite to orange lite, one it stayed on

not sure what the heck it is but don't mind replacing the inverters , issumeits the LC30WX3 part number?

[302931]

Re: Vizio VX32L Main Board

bud I let it run for a couple hours while I ran a errand. Turned it off and cannot get turned back on no voltage on on/off pin the light stays orange , any thought on what to check ?

[budm]

Re: Vizio VX32L Main Board

bud I let it run for a couple hours while I ran a errand. Turned it off and cannot get turned back on no voltage on on/off pin the light stays orange , any thought on what to check ?

That ON/OFF pin (PS-ON) is generated by the main board when the power switch is activated then it will send that signal to turn on the main power supply.
So something on the main board is locked out some how due to bad main board or other board is locking down the main board so the indicator light stays orange.
I wonder if it may be the Remote IR board, you can unplug the cable to that board and see what happen.
http://www.shopjimmy.com/vizio-3642-...-ir-sensor.htm

[302931]

Re: Vizio VX32L Main Board

I have a mother board coming just in case , I unplugged the ir board connector no change, its almost like you have to play with the switch on/off until something finally release and let it turn on. when pushing the on/off it will flip from white to orange and eventually if you work it the power will eventually turn on and back lites come as well

[budm]

Re: Vizio VX32L Main Board

Look at the panel switch assembly to see if anything spill on it or any sign of damage.
Or disconnect the panel switch assembly and put the IR board back in place and use the remote to turn on the TV to see if you can turn it on and off every time.
http://www.shopjimmy.com/vizio-3632-...controller.htm

[302931]

Re: Vizio VX32L Main Board

wall hanging unit but looked anyway looks good. I rang out the switch earlier to ensure it was working as well .

the inverter boards are cheap enough do you think I should replace them or am I on right track with mother board

[budm]

Re: Vizio VX32L Main Board

At this point from what you described related to the indicator light on the front of the TV, the inverter boards will not be the cause of the problem, if you disconnect the inverter boards from the power supply board, the TV should still be able to turn on and off every time (but will not have backlights), there is no lock-out signal from inverter boards to tell the main board if the inverter boards are good or bad.
Try what I suggested in post 31, if it does not make any difference then you are on the right track as bad main board.

[302931]

Re: Vizio VX32L Main Board

thanks bud I do not have the remote here its at my daughters house . will retrieve it and try your suggestion. the fact that the power is intermmt leads me towards the mother board as well . still will try post 31 to help narrow it down. the on/off button turns it white and then it jumps back to orange , if you play with switch and hold long enough it will stay white , thanks for all your help

[302931]

Re: Vizio VX32L Main Board

hey bud I got two different boards from the same supplier mine is a 4C and they sent a 4a which had a issue and then they sent an 4B wth another issue. I tried to see if Jimmy had the board and he doesn't. I sent a note asking for another reputable supplier. Any thoughts kinds a scared to go used again.

[budm]

Re: Vizio VX32L Main Board

You may try this one: I order boards from them before with good return policy and no restocking fees.
http://electropartsonline.com/