Re: Vizio 42'' E420VO. Is it possible to fix?
[QUOTE=budm;224493]You have cracked screen![/QUOT
yes but is possible to get a replacement screen. Does the whole panel (backlight panel and lcd) has to be replaced?Re: Vizio 42'' E420VO. Is it possible to fix?
[QUOTE=budm;224493]You have cracked screen![/QUOT
yes but is possible to get a replacement screen. Does the whole panel (backlight panel and lcd) has to be replaced?Re: Vizio 42'' E420VO. Is it possible to fix?
[QUOTE=budm;224493]You have cracked screen![/QUOT
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Vizio 42'' E420VO. Is it possible to fix?
Does anybody know if this vizio problem can be fixed. TV is 42 inch vizio E420VO. Anybody fixed such a problem?
I have attached pictures to show the symptoms...
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Re: HP w1907 monitor blown(no power at all)
I bought new keyboard and fortunately its perfect. Unfortunately It was an easy fix. Wanted it to be a difficult fix so i could learn a lot. I still learned something thanks to you all especially retirecaps and jasgriff. My next attempt will be an lcd tv. Will have to look on craiglist for a broken one.
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Re: HP w1907 monitor blown(no power at all)
haha...lol...typing on a laptop
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Re: HP w1907 monitor blown(no power at all)
Yes i see everything. Mouse move around.I can even browse.
Typing i mean when i press the keyboard no text shows up....
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Re: Viewsonic VX2235wm-5 _ Will not power up.
Check close to or beneath the ground wire at the AC plug. The white paste might be covering it. Or check the back (green side) of the power board and observe close to the AC plug. The fuse starts with F....
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Re: HP w1907 monitor blown(no power at all)
I assembled the monitor and hooked it up to computer and it worked. But typing is not working which am thinking might be the keyboard. I might have damaged the broad flat cable with connector to the lcd when i was disassembling them. Apart from no typing, everything is perfect. Will change keyboard today to test.
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Re: HP w1907 monitor blown(no power at all)
Amazing the power light(blue and amber) came on or worked when i plugged it into the power bar. Before there was no light or the monitor would not response. I didnt do anything to it. All i did was remove F801 and soldered it back. Hmm whats going on? Do you think its advisable for me to assemble the monitor with the lcd screen and try if it will work.?
I also found some solder joints that were never soldered and I don't know if it was accidental or intentional by the manufacture. I have attached a picture of it. It will...
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Re: HP w1907 monitor blown(no power at all)
I checked the bridge rectifier D801 and mosfet Q804 both in circuit.
Rectifier
1-2=4.86Mohm
1-3=4.82Mohm
1-4=177.7kohm
2-3=1.768Mohm
2-4=4.84Mohm
3-4=4.86Mohm
mosfet
S-G=9.09kohm
S-D=174.9kohm
G-D=191.5kohm
I guess the bridge rectifier and mosfet are not shorted.
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Re: HP w1907 monitor blown(no power at all)
I will appreciate if you can show me the mosfets and bridge rectifiers so i can test them. Thank you...
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Re: HP w1907 monitor blown(no power at all)
These are the board pictures...
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Re: HP w1907 monitor blown(no power at all)
Range from 1.21mb to 1.47mb each and there are about 5 images
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Re: HP w1907 monitor blown(no power at all)
Try uploading pictures but failed. Keep getting this message:
Your submission could not be processed because a security token was missing.
If this occurred unexpectedly, please inform the administrator and describe the action you performed before you received this error.
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Re: HP w1907 monitor blown(no power at all)
I measured two fuses, F801 which is close to the AC source and F802. Both FB01 and F802 measures 0.4ohms so thinking the fuses are ok. Are there anymore fuses am missing on the board that needs to be checked?? I am yet to check on the mosfet. Can you please show me which ones are/is the mosfet? I am thinking is the three pin thing on the heatsink. I have posted pictures of my board.
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Re: HP w1907 monitor blown(no power at all)
I got the meterman but there is no croc or aligator clip so i have orederd one. I have already taken out the main fuse close to where the AC plugs into the board but i was unable to test it with just the test leads without clips. And i have also ordered the blue esr. So I am still waiting to gather my tools. Am i right to check resistance of the fuse out of circuit?
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Re: HP w1907 monitor blown(no power at all)
I can't wait to see my first meter haha. BTW how do i find your post on
1) fuse - a good fuse should measure less than 1.0 ohms
2) bridge rectifier - see if it it shorted
3) power mosfet - see if it is shorted
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Re: HP w1907 monitor blown(no power at all)
thanks i put in a bid and am waiting if i will win. hope i do.
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Re: HP w1907 monitor blown(no power at all)
I went through most of the links and they seem little confusing. Ok i decided to buy two $50 multimeters but they are not true rms. Does it matter for am trying to do? I have decided on the extech ex330. Will the ex330 be ok for my purpose. Thanks
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Re: HP w1907 monitor blown(no power at all)
My budget is around $100 to $150 and i want with esr. Does it mean i dont need a different esr meter for caps?
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Re: HP w1907 monitor blown(no power at all)
thanks retirecaps. Can you please recommend a good multimeter to me?
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