I bought a this monitor and it does not power on. No lights no nothing. Please give any info on how to fix it
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Re: i inc 28inch monitor no power
open it up check capaitor and voltages from regulators
if you do not find a problem upload pictures of board
read the section on how to upload pictures -
Re: i inc 28inch monitor no power
I think that your monitor and the one in the link I am giving you are the same, yours is manufactured my Hanns G. Read the info in this link and when you open your monitor check the pictures of the power board provided on the link to see if it is the same as yours.
https://www.badcaps.net/forum/showthread.php?t=11329Have you ever stopped to think and then forget to start thinking again?
As a very wise man once said on this forum: "Of all the things I have lost I miss my mind the most."
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Re: i inc 28inch monitor no power
i will check.Comment
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Re: i inc 28inch monitor no power
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Re: i inc 28inch monitor no power
The caps have no bloat.Comment
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Re: i inc 28inch monitor no power
Heres another lookComment
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Re: i inc 28inch monitor no power
simple things first: check the fuses (those wine-red boxes in your pics)
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Re: i inc 28inch monitor no power
First things second. The pics are big. This was my first pic.
The main filter cap was around 170v. The six connectors going to the logic board was also checked. On the 5v, I got .1 sometimes .2. The 12v was .1 and then 0 then 2. then 0. I believe this is a cap problem. Also the fuses were good.
If there is any thoughts on this, please let me know. Until I can get the new caps, it kinda of a stand still. I would like to check out the other boards. but without the power board, it will wait.Comment
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Re: i inc 28inch monitor no power
Suggest you measure the voltages again, with ONLY the Power board connected,and no others.If you still get no voltages then I would check to make sure the SMPS chip is working.You will need to take photos of the bottom of the Board,and please use the 'managed items' attachment,and not post in line.Comment
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Re: i inc 28inch monitor no power
For what it's worth, the symptoms indicate either a bad startup cap, an overload on an output, or a shorted diode.
PlainBillFor a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.
Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.Comment
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Re: i inc 28inch monitor no power
Here's the pics of the underside of the psb. The readings earlier was w/o the logic board attached. Still no readings at the connector, unless I'm doing something wrong. Here is the pics, again....Attached FilesComment
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Re: i inc 28inch monitor no power
Google the datasheet for the SMPS chip, and take readings,unfortunately although the photos are fine, cannot read what it is.Comment
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Re: i inc 28inch monitor no power
The two chips in the last pic are as follows: Q150 and Q151 with P4nk602fp ST. There are two more chips along the heat sink wall across from the heat sink with the grated top. They are: U700(STR, w 6252, 0311E). And Q601 with( P10NK602, GE 146) I hope this helps.
Getting worn out lolComment
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Re: i inc 28inch monitor no power
On your photo 3 shows a 8 pin device...thats the one I mean.Also presume you have checked the devices you mentioned on the heatsinks, as without looking for all the details,there are Schottky diodes on there, and if one of them is short cct, will give you your symptoms .Comment
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Re: i inc 28inch monitor no power
Are you referring to IC150? I cannot see any written on it. But will look again with bigger eyes.Comment
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Re: i inc 28inch monitor no power
Well something happened. I hooked up the logic board and the led lit up. Didn't do a thing to the board. Hmmm. a loose connector?
However I believe there is no power going to the inverter board. Will try what Rtech said to do.Comment
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Re: i inc 28inch monitor no power
No IC 601, the smaller one !!Comment
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Re: i inc 28inch monitor no power
Ok. The Q601 is a Fairchild chip. FAN6961SYB The data sheet is on this link:
www.fairchildsemi.com/pf/FA/FAN6961.html
It took me awhile but it's there. I believe this is the one.
Thanks againComment
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Re: i inc 28inch monitor no power
If you get the 5v, then the Fairchild part is OK.On the lead that goes from the Power Supply to the Logic card, there is a Legend shown next to it, can only see the first two pins are GND, and and you need to measure what the other ones are,and advise similar to this:-
Pin 1....legend says Gnd.........is gnd
Pin 2 ...legend says Gnd.........is Gnd
Pin 3 ...etc etc
You need to do this, with the board on its own, and then connected to the rest of the boards, but you don't need the screen connected.Comment
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Hi all!
I'm trying to troubleshoot a Microsoft Surface Pro (5th gen) model 1796 that won't power on. Motherboard model is M1007506-015. My priority is retrieving data, but the SSD is integrated so it looks like if I can't repair it it'll need to go to a data recovery company. I've done a little basic board repair before, but nothing this advanced until now. So please forgive my ignorance in advance. 😅
I found the boardview for this laptop in the forums here, and am able to open it on my PC with FlexBV.
https://www.badcaps.net/forum/troubl...-hardware-devi... -
Hi all,
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Hi all
There's two other threads about this monitor with seemingly the same problem. The problem was resolved in one case by replacing the entire PSU board and in the second one by replacing an unknown IC.
https://www.badcaps.net/forum/showthread.php?t=50657
https://www.badcaps.net/forum/showthread.php?t=40512
The first one has pictures of the pcbs and I noticed that there's one IC and assorted caps not populated on mine (but the PCB itself looks identical) so I thought that'd warrant a new thread.
It's my dad's old monitor. He...
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