Coby Tftv4028 I found a problem to that I change one regulator and it turn on good nothing wrong but the thing is when it's unplug the cord it does the same thing blue light lit but won't power on...I check the regulators and they check good... I know the main is good...theres a problem on the turn on switch and there were am lost.....there mp14280dp can be that the problem...
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Re: coby TFTV4028 blue ligth stays on and won't power on
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Re: coby TFTV4028 blue ligth stays on and won't power on
what kind of voltages do you get out of the power supply? When you press the power button, does the button ASSy change the voltage being sent to the main board or do all the voltage lines going to and from the buttons stay the same no matter what button you press?Comment
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Re: coby TFTV4028 blue ligth stays on and won't power on
You need to stop making threads, this is the 4th one if you wait people will help you. Check the Pson voltage going to the Psu.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: coby TFTV4028 blue ligth stays on and won't power on
Is it the same as this one and the others?
https://www.badcaps.net/forum/showth...t=53484&page=2Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: coby TFTV4028 blue ligth stays on and won't power on
The other thread was for a model 4025 and I fix it was the power and it is working fine.....now this is a 4028 bit diferente power and main....Comment
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Re: coby TFTV4028 blue ligth stays on and won't power on
When I press the power nothing does, but when I plug the tv the blue light comes on like tv was on check the power and I have 24v for the inverter..and 5v for stanby....Comment
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Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: coby TFTV4028 blue ligth stays on and won't power on
Ps on I got 4.2v and 5vSB 4.9v this is with blue light on it won't change even if I press powerComment
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Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: coby TFTV4028 blue ligth stays on and won't power on
I did not just I replace the power supply and fix the problem on 4025...but wanted to check if I can fix the power and saw It was more cheap to buy a working power that to fix itComment
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Re: coby TFTV4028 blue ligth stays on and won't power on
But the main board when I move parts or change a cap it work fine even if a press on and off..once it is unplug u won't able to turn on again blue light keep lit againComment
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Re: coby TFTV4028 blue ligth stays on and won't power on
this voltage regulator I change it and work with on and off ...just right away when I unplug the cord it wont power the cap above the grey resistor change it and work again.....just work until I unplug the cord.Attached FilesComment
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Re: coby TFTV4028 blue ligth stays on and won't power on
On the ps on on power supply y get 38.6v?? And when I turn on I get 4.21v??Comment
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Re: coby TFTV4028 blue ligth stays on and won't power on
the last picture is when I unplug it and blue light comes and won't come onAttached FilesComment
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Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.
Upon bringing it home and plugging it up, it showed a standby light.
I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.
The screen seems to blackout and stay black, but with a flashlight I can see the display.
With my Playstation 4 connected via HDMI, and running a game I can hear sound.
Assuming... -
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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