Issue with Westinghouse 19" LCD Monitor (large pics)

[Welchs101]

Re: Issue with Westinghouse 19" LCD Monitor (large pics)

Note: When mosfets are NOT in the circuit the fuse will NOT blow open. When mosfets are IN the circuit and CCFLs disconnected the fuse will blow to an open.

Does this suggest something to someone? Not sure what to check? Could mosfets be bad or could it be something else?

[Welchs101]

Re: Issue with Westinghouse 19" LCD Monitor (large pics)

correction fuse keeps "OPENING" not shorting. Same situation as PGP described.

[Bobdee]

Re: Issue with Westinghouse 19" LCD Monitor (large pics)

Hello Welchs101
I take it that this is the same problem you had back in March of this year ?
Had another thought, just maybe you may have a bent pin in one of the four plugs of inverter sockets to the CCFLs causing a short, or a bad wire or CCFL shorting in the screen itself

[Bobdee]

Re: Issue with Westinghouse 19" LCD Monitor (large pics)

I am having the same problem that PGP described. Fuse keeps shorting...........

PGP: Did you ever solve this issue?

Also, anyone have any ideas?

Worth checking for failed transistor/mosfet (Q205 Q206) or failed transformer, also check for bad solder joints, particulary on the transformer/s (inverter that is)

[Welchs101]

Re: Issue with Westinghouse 19" LCD Monitor (large pics)

I am having the same problem that PGP described. Fuse keeps shorting...........

PGP: Did you ever solve this issue?

Also, anyone have any ideas?

[PlainBill]

Re: Issue with Westinghouse 19" LCD Monitor (large pics)

Hi Guys, I am having problem repairing my Acer 1916 monitor. There was no backlight. I replaced all bulging caps and still the same. Check the Mosfet and is OK. Check F200 and is Ok. Please help. Thanks

Dang!! You've already covered most of the easy solutions. Have you checked the supply (12V) for the inverter? Have you checked the control line? Pictures of the power supply / inverter would be helpful.

PlainBill

[joshua_20]

Re: Issue with Westinghouse 19" LCD Monitor (large pics)

Hi Guys, I am having problem repairing my Acer 1916 monitor. There was no backlight. I replaced all bulging caps and still the same. Check the Mosfet and is OK. Check F200 and is Ok. Please help. Thanks

[Bobdee]

Re: Issue with Westinghouse 19" LCD Monitor (large pics)

Hello =)
I've read this post post by gfgray

In my case monitor Acer AL1916W.
Power-Invertor is DAC-19M005 BF Rev. 01A.
No backlight and display is black. But Power button is working (lights with green or orange).
Capacitors C204, CE103 were bulbed. And F200 was open.

For now i've change all these parts.
MOSFETS Q206, Q205 (there wasn't 40T03GP and i've set CEP50N06)
Capacitors C204, CE101, CE109 (220mF, 25V)
Capacitors CE103, CE104 (1000mF, 25V).

SMT F200 (4A).

But still no success.
All the times i try to launch monitor - Fuse F200 just opens.
I suspect that somewhere something is shorted.

I tried to short F200 with solder. But Q206 becomes very very hot when i try to turn on the monitor.

Could you please advise? What else i have to look up? =)

Thanks a lot in advance for all.

Hello
Suggest you check the CCFLs as one or more may be bad also check solder joints on inverter transformers
As the fuse keeps failing it may have caused a repeat failure in Q205 or Q206 as you dont seem to have found the fault that may have caused there failure in the first place (assuming you replaced them because they failed)

[PGP]

Re: Issue with Westinghouse 19" LCD Monitor (large pics)

Hello =)
I've read this post post by gfgray

In my case monitor Acer AL1916W.
Power-Invertor is DAC-19M005 BF Rev. 01A.
No backlight and display is black. But Power button is working (lights with green or orange).
Capacitors C204, CE103 were bulbed. And F200 was open.

For now i've change all these parts.
MOSFETS Q206, Q205 (there wasn't 40T03GP and i've set CEP50N06)
Capacitors C204, CE101, CE109 (220mF, 25V)
Capacitors CE103, CE104 (1000mF, 25V).

SMT F200 (4A).

But still no success.
All the times i try to launch monitor - Fuse F200 just opens.
I suspect that somewhere something is shorted.

I tried to short F200 with solder. But Q206 becomes very very hot when i try to turn on the monitor.

Could you please advise? What else i have to look up? =)

Thanks a lot in advance for all.

[big3inches]

Re: Issue with Westinghouse 19" LCD Monitor (large pics)

Thanks for the speedy reply. Yeah, all Capxon caps have been replaced, the two mosfets and the f200 fuse. After checking the board again I noticed that "RT100", which is located next to the large 400V cap, is cracked. When pulling the large cap out I must have cracked it.

Do you think that RT100 would cause this?
Could a bad solder joint be the culprit?
Would there be noticable damage on the CCFL's?

Thanks Again.

[EGuevarae]

Re: Issue with Westinghouse 19" LCD Monitor (large pics)

I want to thank everyone on here for all the help and comments about these monitors. I have an L1975NW. Ordered all the caps from post 23(9 total), the 2 mosfets from ebay and the 4 amp fuse. Everything have been replaced. Before the monitor never came up, now when I turn on the monitor the screen comes up for a second then cuts out. I can see it with a flashlight so obviously it is the backlight. Any ideas on what to do next?

You may have bad CCFLs in there. Find a "Neon"/CCFL kit for a case, and use it to test your lamps
I'm assuming you used the suggested replacement caps, and that the MOSFETs were changed (you said it turns on and then off, so the MOSFETS and fuse were replaced).

[big3inches]

Re: Issue with Westinghouse 19" LCD Monitor (large pics)

I want to thank everyone on here for all the help and comments about these monitors. I have an L1975NW. Ordered all the caps from post 23(9 total), the 2 mosfets from ebay and the 4 amp fuse. Everything have been replaced. Before the monitor never came up, now when I turn on the monitor the screen comes up for a second then cuts out. I can see it with a flashlight so obviously it is the backlight. Any ideas on what to do next?

[Krankshaft]

Re: Issue with Westinghouse 19" LCD Monitor (large pics)

That's one thing that's here to stay I'm afraid .

[EGuevarae]

Re: Issue with Westinghouse 19" LCD Monitor (large pics)

I remember when I saw these Westinghouse LCDs at Target in 07 one of them was plugged in and dead on the display.

That should have told anyone they would be trouble .

Didn't wow me at all most names like Westinghouse, RCA, GE, etc are sold to the highest bidder and are rebranded Chinese crap in the hopes of rusing consumers that they are of similar quality associated with the name printed on them.

Dead driver transistors again? FET shorts overloads inverter supply blows fuse. It's funny how similar the failures are to the Benq builds.

Are they using the same crappy design or something?

At least the same crappy caps ....

[Krankshaft]

Re: Issue with Westinghouse 19" LCD Monitor (large pics)

I remember when I first saw these Westinghouse LCDs at Target in 07 one of them was plugged in and dead on the display.

That should have told anyone they would be trouble .

Didn't wow me at all most names like Westinghouse, RCA, GE, etc are sold to the highest bidder and are rebranded Chinese crap. They do this in the hopes of rusing consumers that the product is of higher quality due to the preconceived notions the consumer has of the recognized brand name.

Dead driver transistors again? FET shorts overloads inverter supply blows fuse. It's funny how similar the failures are to the Benq builds.

Are they using the same crappy design or something?

[EGuevarae]

Re: Issue with Westinghouse 19" LCD Monitor (large pics)

Thanx for the reply but this pic helped even more!!! It had the details I was needing.

https://www.badcaps.net/forum/attach...achmentid=9454

Thanx again for your reply!!!

Jake...

Nice to know that my pics actually help someone ....

[Jakes]

Re: Issue with Westinghouse 19" LCD Monitor (large pics)

Thanx for the reply but this pic helped even more!!! It had the details I was needing.

https://www.badcaps.net/forum/attach...achmentid=9454

Thanx again for your reply!!!

Jake...

[Bobdee]

Re: Issue with Westinghouse 19" LCD Monitor (large pics)

Very nice pics and excellent thread. I have repaired several of these boards with no problems. I just received one from a customer that the PCB is burned under the CE101 capacitor; location next to the J203 or J205 "O" fuse.

The run is burned and I can't make out which direction it goes. Does anyone have a schematic or a link to on for the DAC-19M005 board?

Any help appreciated...

Jake...

Hello Jake
Did you see these earlier in the thread,they may help
https://www.badcaps.net/forum/showpo...0&postcount=92
Bob

[Jakes]

Re: Issue with Westinghouse 19" LCD Monitor (large pics)

Very nice pics and excellent thread. I have repaired several of these boards with no problems. I just received one from a customer that the PCB is burned under the CE101 capacitor; location next to the J203 or J205 "O" fuse.

The run is burned and I can't make out which direction it goes. Does anyone have a schematic or a link to on for the DAC-19M005 board?

Any help appreciated...

Jake...

[kozimus]

Re: Issue with Westinghouse 19" LCD Monitor (large pics)

Wow , this thread was very helpful ,it help me save my wallet from some spending's and my Westinghouse L1975NW monitor.I had the same issues power led is on and no back light.I replaced the bad caps and the FET's and of course the fuse.
I think there is a much simple way for the fuse, instead of looking for SMD fuse ,I used a regular one . You can see the links to pictures below.
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