Emerson lc407em1 Turns on screen only flashes, then off

[proaudiosoft]

Re: Emerson lc407em1 Turns on screen only flashes, then off

If you get the FUNAI part number for this board (begins with BA9) I may be able to find a schematic, if you don't already have one.

the part number is BA01P0F01 03 3

[proaudiosoft]

Re: Emerson lc407em1 Turns on screen only flashes, then off

Ok, I believe I found the service manual:

[proaudiosoft]

Re: Emerson lc407em1 Turns on screen only flashes, then off

I am curious weather the ccfl's or inverter might be the cause since the screen flickers on the off 1 time when powered on near the center. I should also note that the person I received this tv from said it was damaged in a lighning storm

[proaudiosoft]

Re: Emerson lc407em1 Turns on screen only flashes, then off

bump

[proaudiosoft]

Re: Emerson lc407em1 Turns on screen only flashes, then off

should the tv stay powered on with inverter disconnected?

[proaudiosoft]

Re: Emerson lc407em1 Turns on screen only flashes, then off

Any input on what to check would be so appreciated

[proaudiosoft]

Re: Emerson lc407em1 Turns on screen only flashes, then off

Any input on what to check would be so appreciated

bump

[proaudiosoft]

Re: Emerson lc407em1 Turns on screen only flashes, then off

been a long while. just pulled this tv out from the basement again. I would love to get it working. I do not seem to have 345v (yes i do, disregard this)***EDITED) that i am supposed to. tv powers on, blinks green 15 times (as before, still the same ), then powers off. Any help would be so appreciated.

[proaudiosoft]

Re: Emerson lc407em1 Turns on screen only flashes, then off

Ok, so i have resurrected this thread. I still have this tv, same problem, never fixed yet. All voltages seem to be good on the power supply, my previous comment of missing 345v was in error, its there still. A couple voltages seem to be a couple volts higher maybe, but they all seem to be present. I am tempted at this point to order a used mainboard off ebay and give it go. does anyone have any input on anything I might check before doing so? I would like to power this supply on with the mainboard disconnected, but this particular mainboard has 2 cables coming from the supply, and both seem to be necessary for powering on with backlight operating and such. Any advice or guidance greatly appreciated.

[proaudiosoft]

Re: Emerson lc407em1 Turns on screen only flashes, then off

Fixed this on my own.

[tom66]

Re: Emerson lc407em1 Turns on screen only flashes, then off

It would be useful to say HOW you fixed it, for others in future.

[proaudiosoft]

Re: Emerson lc407em1 Turns on screen only flashes, then off

Replaced digital mainboard, no luck. Replaced inverter board, success. Fooled me because I would have thought TV would have stayed powered on with inverter removed from the circuit.

[nomoresonys]

Re: Emerson lc407em1 Turns on screen only flashes, then off

Hi, I am new to these forums, I have repaired several tv's , Just wanted to see if I could get some help on this one. The powerboard (and other boards) have no visible bad caps. Power seems ok at any marked voltage points on the power board. The inverter visibly looks ok too. When power is pressed the green light comes on, flashes 15 times, then back to red. I was thinking the problem is possibly the inverted since the screen just flashes very briefly then off like a second later. but If I unplug the inverter from the circuit, the TV still flashes green 15 times green then off. does this mean its not the inverter, or the tv is going into protection mode again without it?

And insight or help I would so much appreciate. I can post any pictures if need be. Thanks, Roger

you were on the solution in your first post,