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twobucks420
Joined: 07 Aug 2011 Posts: 5
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Posted: Sun Aug 07, 2011 12:49 am Post subject: Viewsonic n2750w turns on for split second then goes bla |
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Hello all
I just recently had a viewsonic n2750w vs10576-1m have back light problems.
when i turn the TV on the screen appears in full color for a split second then goes to black (with no menus displaying) with audio still playing. I am suspecting the inverter board since the power supply all seems fine. The second problem i have is finding an inverter board. I have found a board that is close to what i have but a few numbers are different
my board is a Darfon 48.v0708.001 /E2 l270W1-24-V04 REV 1G
VO8807010104 G26 S163185 E206453 V070-001
proposed board Darfon 48.v0708.001 /E2 l270W1-24-V04 REV 1G VO8807010104 G34 S362143 E206453 V070-001 |
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twobucks420
Joined: 07 Aug 2011 Posts: 5
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jts1957
Joined: 24 Nov 2008 Posts: 2476 Location: Far, Far Away
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Posted: Sun Aug 07, 2011 3:56 am Post subject: |
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Don't forget, It can also be bad CCFL bulbs.
IF you have "power" and "backlite ON" voltages present, it could be defective Inverter board or bulb(s). _________________ You're over there, I'm over here. |
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twobucks420
Joined: 07 Aug 2011 Posts: 5
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Posted: Sun Aug 07, 2011 4:17 am Post subject: |
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well just to give u a little more information the TV started acting up about a week ago where in the morning the TV would turn on for an instant and then black out. I would then turn the TV off then back on and the tv would work no problem. Now its to the point where it just doesn't stay on. Do you still think that the bulbs could be the culprit if the entire screen lights up for an instant? |
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minnie
Joined: 18 Aug 2005 Posts: 2880 Location: Hell
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Posted: Sun Aug 07, 2011 7:02 pm Post subject: |
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Look for burn holes in the transformers. |
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jts1957
Joined: 24 Nov 2008 Posts: 2476 Location: Far, Far Away
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Posted: Mon Aug 08, 2011 2:11 am Post subject: |
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Possibilities:
Bulbs (in LCD panel);
Fuse(s), Transformers, Electrolytic capacitors, driver transistor(s)/MOSFETS/ICs - ALL on the inverter board;
Inverter board NOT receiving continuous B-Plus (from the power supply);
Inverter board losing "ENABLE" voltage (usually from main board). Should be present when your screen lights and should still be present even after the screen goes out. _________________ You're over there, I'm over here. |
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twobucks420
Joined: 07 Aug 2011 Posts: 5
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Posted: Wed Aug 10, 2011 12:13 am Post subject: |
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ok i just used a cheap inverter and checked each ccfl. Each one lit up with no problems at all. I think this rules out the bulbs unless someone can tell me otherwise. I also ordered a new inverter board and should be arriving Thursday. I will keep you posted.
Thanks |
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twobucks420
Joined: 07 Aug 2011 Posts: 5
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Posted: Fri Aug 12, 2011 1:18 am Post subject: |
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i just installed the inverter board and the TV seems to be working fine. I hope this fixed it for good.
Thanks for all the ideas |
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minnie
Joined: 18 Aug 2005 Posts: 2880 Location: Hell
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Posted: Fri Aug 12, 2011 4:17 am Post subject: |
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