Re: LCD TV won't turn on. LED keeps blinking
red lead for the 12th pin its ok. and black pin for? i didn't get it
like this?
red lead for the 12th pin its ok. and black pin for? i didn't get it
like this?
Attached Files
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Last edited by sahan14; 10-14-2016, 03:21 AM. -
Re: LCD TV won't turn on. LED keeps blinking
the large capacitor you have been testing 325 v on use the negitive side of that capacitor for your black multimeter test lead,Comment
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Re: LCD TV won't turn on. LED keeps blinking
0.85v in vcc and the - cap
board is not connected to the tv. but powered and switched onComment
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Re: LCD TV won't turn on. LED keeps blinking
ok thanks now we need to trace back and see why the voltage is so low bear with us as im still leaning myself so maybe dick or budm can advise what too check next as i cant seem to fnd a schematic/service manual for your setComment
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Re: LCD TV won't turn on. LED keeps blinking
is it the problem with IC?Comment
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Re: LCD TV won't turn on. LED keeps blinking
with the tv turned off and unplugged what RESITANCE do you get between the vcc pin and ground pins like you marked in your picture .Comment
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Re: LCD TV won't turn on. LED keeps blinking
310 k ohmsComment
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Re: LCD TV won't turn on. LED keeps blinking
Can you post clear bright pictures of the top and bottom of the power supply board. Take it out into the sunlight and take the photo's. It's difficult to identify anything on the boards.Willing to help but I'm no expert.Comment
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Re: LCD TV won't turn on. LED keeps blinking
image is too large. may i upload as a winrar?Comment
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Re: LCD TV won't turn on. LED keeps blinking
Why is there a piece of wire connected from R9 to G of mosfet?
There are quite a few solder joints that do not look very good.
I see that some of the mosfets have been taken out. Have they been checked using your ohm meter
Have you also tested D8, ZD3, D12, Q4, ZD3 and D4 using your ohm meter?
I think it would be best to order a replacement power supply.Attached FilesWilling to help but I'm no expert.Comment
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Re: LCD TV won't turn on. LED keeps blinking
solder joints are now ok. i checked them.
i replaced all components .
the wire is now not on the board. it soldered by me.
i soldered the wire because Q1 is not connected to the GND i thought the path is missing. but the wire did not solve the issueComment
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Re: LCD TV won't turn on. LED keeps blinking
i tested ZD3, D12, Q4, ZD3 by removing
they are working...
also D8 is workingLast edited by sahan14; 10-14-2016, 09:49 AM.Comment
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Re: LCD TV won't turn on. LED keeps blinking
Thnk you dick_barton for the advice.Comment
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Re: LCD TV won't turn on. LED keeps blinking
IMO seems like the SMP Ic is not running.Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !
https://www.facebook.com/Telford-Tel...7894576335359/Comment
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Re: LCD TV won't turn on. LED keeps blinking
Unfortunately I don't think sahan14 is familiar with repairing which is why I suggested a board replacement would probably be the best course of action.Willing to help but I'm no expert.Comment
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Re: LCD TV won't turn on. LED keeps blinking
I have too agree with you now too i would source a replacement board.Comment
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Re: LCD TV won't turn on. LED keeps blinking
psu schematicComment
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Re: LCD TV won't turn on. LED keeps blinking
I can replace the IC. yes.. I don’t have good knowledge with repairing. but i can understand what you are telling..Comment
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Hi everyone,
I've got this LG TV here that wouldn't turn on and be stuck in a standby loop (blinking red once every other second).
Did test the following:
* LED's seem fine as they all light up using LED Tester
* Power Supply supplied around 111V for each LED Strips (2x edge lid strips)
* PWR_ON would be at around 3V but dropping every other second (just like the standby light)
* DRV_ON is doing the same
* power supply has a green LED onboard, but that doesn't seem to do anything (stays off the whole time).
* there is a tiny clicking... -
Hi there,
I have this ASUS X453MA Laptop that's not turning on. When I plug in the charger, the green light just keeps on blinking and pressing the power button does nothing.
I have checked the charger and it is giving 19+ V
I have disconnected the battery and pressed power button for 30 seconds.
I tried another RAM stick.
Tried disconnecting the keyboard and touchpad.
Tried disconnecting the HDD and the wifi adapter.
The problem persists.
Hope you could help me out on this one. Thank you.12-14-2024, 06:40 AM -
Hello, i have some issues with my laptop Lenovo Y700-17ISK (motherboard BY511 NM-A541), it started when i turn on the laptop, but the lcd wont turn on, i then connected it via hdmi to tv and screen was ok. So i thought maybe lcd stripe is faulty, i removed the bottom cover, disconnected main battery, reset the cmos by disconnecting battery for 1 min, then slighty move the lcd stripe. Conncted power supply and tuned on my laptop, the lcd turn on, it started to load os, then it turn off, after a second it turn on, then after like 3 seconds turn off again, and so on. Removed power supply, waited... -
Hello
I was looking for a schematic or board view but unfortunately I didn't find anything.
By connecting the drain and source of pq58, the device turns on and works perfectly, but the battery doesn't charge, and I don't know the path of the circuit to the MOSFET.
Is the problem with the adapter? Or is there a problem with the MOSFET activation circuit?
Please guide me.
Thank you. -
To all the members here...
Let me tell you a little bit about what happened to my laptop (MSI GF63 THIN 11UCX model: MS-16R6) that “maybe” you know how to solve this problem.
So before this problem happened, my laptop was running smoothly. When I wanted to restart my laptop, it looked fine at first. But after I waited for this restart process to take a long time, until finally I panicked (because the restart process did not finish plus the laptop screen only showed a black screen), I immediately pressed and held the power button to force the laptop to turn off. But...
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