Issue with Westinghouse 19" LCD Monitor (large pics)

[blackrider1]

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

Hello,although this post was started several years ago, it still keeps alive, so, after reading the whole tread, I think I can help a little.
When trying to fix an ACER 2017, I used this dac-19m005 datasheet I found on the web.

http://www.megaupload.com/?d=YJWEDABQ

Here you can see schematics and components. Although it is a different LCD model, is has the same power board: DAC-19M005 CF REV: 00A, (plus it has just DUB conector, no DVI, but still the same board too), so: same problems and same fixes, I guest.
After recapping all (same 2 bulged caps as every faulty board), I can see images on the screen but no backlight. You only can see it taking a light close to the screen ( I didn´t read anybody in this situation, everybody has no light but nobody has mentioned about dark images with no backlight)
All the fuses on the backside are OK but I can see a damage transistor: Q204, on the backside, right close to the F200 4A fuse, so probably this is what I need to fix.
According to Kahless (on post #299 and # 301) and billy 66 ( #320) I can see Q2004 burnt ( probably that´s because F200 fuse didn´t blew up), but I checked R210 and I got about 11 Ohm, so I think it´s Ok. Anyway, I ordered replacements for the whole components:Q204,Q208 and R210.
I´ll post the results when I get it working here or in a new thread refering ACER 2017 (only DUB, no DVI conector)
Thanks

[EGuevarae]

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

What EGuevarae said. And for Faraday's sake, use some punctuation. Unreadable posts often aren't read.

PlainBill

Read?
As a matter of fact, I tend to read posts aloud to practice my English (2nd language) and see where punctuation can be inserted and such,so I can both try to help, learn and also improve my language.... you should try to read it....

[PlainBill]

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

What EGuevarae said. And for Faraday's sake, use some punctuation. Unreadable posts often aren't read.

PlainBill

[EGuevarae]

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

My screen is a westinghouse 19" TV here are the problems with it it does work some what no sound screen takes 30min to power on click PC white screens and freezes click HDMI white screen and freezes now when i try to boot it back on blue LED flashes and wont power on til i pull the plug and plug it back in and wait another 30 min i pulled it apart thinking it was a loose wire inside it every thing is clean but 1 cap on the psu was bubbles but if you look at all the pix most of them are like that so i put it all back together i been reading forums and contacting people for the past few days now talking about the problems i own a westinghouse 32" tv nothing wrong with it its an old TV now never had a problem this lil 19" is a pain any ideas on what i should do with this screen

This thread is of a specific model.If it's your unit, post a pic set of the boards and cap info and we'll go from there.

[aoggameover]

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

My screen is a westinghouse 19" TV here are the problems with it it does work some what no sound screen takes 30min to power on click PC white screens and freezes click HDMI white screen and freezes now when i try to boot it back on blue LED flashes and wont power on til i pull the plug and plug it back in and wait another 30 min i pulled it apart thinking it was a loose wire inside it every thing is clean but 1 cap on the psu was bubbles but if you look at all the pix most of them are like that so i put it all back together i been reading forums and contacting people for the past few days now talking about the problems i own a westinghouse 32" tv nothing wrong with it its an old TV now never had a problem this lil 19" is a pain any ideas on what i should do with this screen

[bostoncommon]

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

Just tried it out despite my poor soldering job, and there's now a flicker whenever I turn the power on/off. Still getting very faint/dark images tho. At this point, I'm not sure if I can do any more resoldering/soldering... Ive been at it for 6 hours ><, ah we'll see.. maybe I'll feel different tomorrow and try to do a better job.

ps. I officially hate the soldering part now lol

[bostoncommon]

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

I'm so tempted to just get the board now and thrash this one lol... Im not cut out to soldering tiny pieces onto the board, its a frustrating task to do ><

[bostoncommon]

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

I got them I'm have a hard time soldering.. urghhh... Question, if the soldering wasn't as volcano-perfect, would it still cause to fail ?

[EGuevarae]

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

Although I did research which brands are the "good caps," my impatience got in the way and I just wanted to buy any replacement caps from the nearest retail store ^^; I initially thought that the bad caps were the only problem. I badly wanted it to work and wasnt really thinking long term. If anything, this will be more of an experimental project lol

Right now tho I'm using a measly 15in CRT monitor...

GOt both FETs removed now (yayy!) So I guess all I have to do now is wait for my mosfet to arrive.. I havent ordered the fuse yet, just wanted to see if everyting will work with the temp bridged fuse first. And if it does work, I'll repalce the all the caps with better ones and get that fuse

[bostoncommon]

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

Although I did research which brands are the "good caps," my impatience got in the way and I just wanted to buy any replacement caps from the nearest retail store ^^; I initially thought that the bad caps were the only problem. I badly wanted it to work and wasnt really thinking long term. If anything, this will be more of an experimental project lol

Right now tho I'm using a measly 15in CRT monitor...

GOt both FETs removed now (yayy!) So I guess all I have to do now is wait for my mosfet to arrive.. I havent ordered the fuse yet, just wanted to see if everyting will work with the temp bridged fuse first. And if it does work, I'll repalce the all the caps with better ones and get that fuse

[PlainBill]

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

Thanks everyone. Attached are the pics I originally took before replacing the bad caps. Sorry for the poor quality but its from my friends phone

The new caps I replaced are from radio shack, its a XICON brand 220 uF, 35V, got all 3 replaced. I just ordered the mofset off eBay, and Im tryin to take the old ones as we speak.. (any tips takin em off, its taking me so long... im using a 30watt iron, desoldering braid)

Fuse is F102 which Ive located on my board and I did try to bridge it just to test it out, but that didnt work lol. I will buy the fuse off mouser, the 4 amp one

Thats about it for now, but IM not really optimistic.. but we'll keep you guys updated

This is one of the common screw-ups. Xicon does not make a low ESR cap suitable for use in the switching mode power supply (SMPS) used in monitors. You can buy the right caps for less money from Digikey or Mouser. If you are going to keep the monitor, expect to be replacing the caps within a year. If you sell it, expect to have a very unhappy customer in the same time frame.

PlainBill

[EGuevarae]

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

Thanks eGuevarae! Yah, I dont know anything about mosfets, fuses and how they work lol but I do get an image but its just very faint /dark. I replaced the caps that were bulging, but I still have those big Capxon caps, but they werent bulging

And yes I need patience lol but I finally removed one fet... I kinna pulled it out at the end tho, but I think it's okay.. I hope.. On to the next one xD

You need to replace them all (caps) even if they are not bulged.
And as for knowing nothing, I was a bank teller when I joined the forums (unemployed now...) and did not know nothing,except to follow instructions/suggestions and do a lot of reading ...

[bostoncommon]

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

Thanks eGuevarae! Yah, I dont know anything about mosfets, fuses and how they work lol but I do get an image but its just very faint /dark. I replaced the caps that were bulging, but I still have those big Capxon caps, but they werent bulging

And yes I need patience lol but I finally removed one fet... I kinna pulled it out at the end tho, but I think it's okay.. I hope.. On to the next one xD

[EGuevarae]

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

Thanks everyone. Attached are the pics I originally took before replacing the bad caps. Sorry for the poor quality but its from my friends phone

The new caps I replaced are from radio shack, its a XICON brand 220 uF, 35V, got all 3 replaced. I just ordered the mofset off eBay, and Im tryin to take the old ones as we speak.. (any tips takin em off, its taking me so long... im using a 30watt iron, desoldering braid)

Fuse is F102 which Ive located on my board and I did try to bridge it just to test it out, but that didnt work lol. I will buy the fuse off mouser, the 4 amp one

Thats about it for now, but IM not really optimistic.. but we'll keep you guys updated

1.- Caps are not the recommended replacements.
2.- Without changing the MOSFETS you will never get an image,even if the fuse is bridged (the fuse blew because the MOSFETs shorted...)
3.- MOSFET Removal tip? Patience, my friend....

[bostoncommon]

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

Thanks everyone. Attached are the pics I originally took before replacing the bad caps. Sorry for the poor quality but its from my friends phone

The new caps I replaced are from radio shack, its a XICON brand 220 uF, 35V, got all 3 replaced. I just ordered the mofset off eBay, and Im tryin to take the old ones as we speak.. (any tips takin em off, its taking me so long... im using a 30watt iron, desoldering braid)

Fuse is F102 which Ive located on my board and I did try to bridge it just to test it out, but that didnt work lol. I will buy the fuse off mouser, the 4 amp one

Thats about it for now, but IM not really optimistic.. but we'll keep you guys updated

[EGuevarae]

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

Please Do not try to bypass any fuses they are there for a reason.

I agree.I bypassed it to see if it was going to work or not.It is not advisable to do it (even to test).
Answering your question, you just have to cover the fuse in solder.But you need to post pics so we can show you where to look.

[retiredcaps]

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

1. How can you tell if the fuse is "open," without using any gadgets/gizmos lol

You require a multimeter to tell if a fuse is open or not. A good fuse will read less than 1.0 ohms. All ohms or resistance measurements are done with power off and lcd unplugged.

If you have no money to buy a multimeter, borrow one from a friend or family member.

[alexanna]

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

Sorry to revive this thread, but I have the exact same problem. First off, I really had no interest in repairing electronics and the like but I have no choice since I don't have the $$$ to buy a new monitor

Before finding this site, I came across information that all I needed to do was replace the bad caps, which I did... and boy was it a pain the a$$! It was my first time de-soldering and soldering that I probably did a poor job soldering (except for one cap lol)

Tested my monitor, and voila, a faint dark image... at least I got an image! Then I realized I forgot to plug those 4 backlight cables back in, so I had to re-open the darn thing, but hoping that it will work this time. Of course, it didn't.. so google once more!

And that is how I found this thread. So, please forgive me for asking these dumb questions...

1. How can you tell if the fuse is "open," without using any gadgets/gizmos lol
2. This Q is more for eGuevara > Do you have any pics that show how you bridged the fuse by soldering?

Well that's it for now... If nothing works, I might just get a replacement board on eBay...

You're going to have to have some interest to repair your monitor.
You are also going to need some type of a volt/ohm meter.
You will also need to post some photos of what you're working on. Please use the managed attachments option, and very detailed so we can read the markings on the board.
What type of capacitors did you use, what make and series?
Please Do not try to bypass any fuses they are there for a reason.

[bostoncommon]

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

Sorry to revive this thread, but I have the exact same problem. First off, I really had no interest in repairing electronics and the like but I have no choice since I don't have the $$$ to buy a new monitor

Before finding this site, I came across information that all I needed to do was replace the bad caps, which I did... and boy was it a pain the a$$! It was my first time de-soldering and soldering that I probably did a poor job soldering (except for one cap lol)

Tested my monitor, and voila, a faint dark image... at least I got an image! Then I realized I forgot to plug those 4 backlight cables back in, so I had to re-open the darn thing, but hoping that it will work this time. Of course, it didn't.. so google once more!

And that is how I found this thread. So, please forgive me for asking these dumb questions...

1. How can you tell if the fuse is "open," without using any gadgets/gizmos lol
2. This Q is more for eGuevara > Do you have any pics that show how you bridged the fuse by soldering?

Well that's it for now... If nothing works, I might just get a replacement board on eBay...

[ifly]

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

Sorry wrong Westinghouse the board is for a 19" TV.