I have a Sony that is dead. Totally dead....
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Re: Sony 40EX400 Dead No Power....
Good - why not tell us what testing you have done - save us asking.Please upload pictures using attachment function when ask for help on the repair
http://www.badcaps.net/forum/showthread.php?t=39740 -
Re: Sony 40EX400 Dead No Power....
I would like to try and repair the power supply. They are asking to much everywhere i see it for sale.Comment
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Re: Sony 40EX400 Dead No Power....
How have you determined the power board is bad?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Sony 40EX400 Dead No Power....
Yes - so have you tested anything at all - we dont have time to go through asking if you have tested each component one at a time. Have you read the other threads on the same problem with the same set.Please upload pictures using attachment function when ask for help on the repair
http://www.badcaps.net/forum/showthread.php?t=39740Comment
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Re: Sony 40EX400 Dead No Power....
Yes read the other threads. Im getting 3.3v only. No power indicators. Im not quite sure how to do the jumper. Also im not quite sure how to test on the hot side of the board. Basically using my 450v as reference, haven't made it that far in my online course yet ;-)Comment
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Re: Sony 40EX400 Dead No Power....
1. Test the 3 fuses
2. voltage on BIG cap - care high voltage maybe 400vDC ish.Please upload pictures using attachment function when ask for help on the repair
http://www.badcaps.net/forum/showthread.php?t=39740Comment
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Re: Sony 40EX400 Dead No Power....
I downloaded the manual. The other thread that had the same problem the guy just bought boards. They didn't narrow down the problem with the board.Comment
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Re: Sony 40EX400 Dead No Power....
I dont know what fuses to check. Any direction will be great.Comment
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Re: Sony 40EX400 Dead No Power....
Anyone :-/ lolComment
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Re: Sony 40EX400 Dead No Power....
Fuse PS6401, PS6402 on the power supply board, the main AC fuse is OK otherwise you will not get 3.3VLast edited by budm; 11-22-2014, 11:02 PM.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: Sony 40EX400 Dead No Power....
Right ok let me check thanks.Comment
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Re: Sony 40EX400 Dead No Power....
So these black components screwed into the heat sync on the power supply are fuses?Comment
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Re: Sony 40EX400 Dead No Power....
I have no ideas what you are talking about, did you look at the board?
https://www.badcaps.net/forum/attach...1&d=1416577619Never 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: Sony 40EX400 Dead No Power....
I miss read the location sorry about that.Comment
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Re: Sony 40EX400 Dead No Power....
And nothing at either fuse....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: Sony 40EX400 Dead No Power....
I dont have any ideal. I know how to use a iron and im trying to learn the rest. I have a shit load of broke tvs from taking them in to learn. I use to run a cell phone repair store. Changing screens and parts on phones. And I can mod consoles.....Im trying to learn I threw the meter on each leg is that wrong. I thought this place was the place to learn. Sorry I don't know as much as I would like to but I am willing to learn. And im willing to stay and pass along what I learn. And I appreciate everything. If I knew how to test the components I wouldn't ask.Comment
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Re: Sony 40EX400 Dead No Power....
OK, please read the meter user manual first to see how to do resistance test, DC test (you already know that), AC Voltage test.
There is the primary side of the circuit that is connected to the deadly power line which you will have to do the test, for the beginner to be working in that section is not recommend.
Right now the main board is getting the standby Voltage of 3.3Vdc to run the board, if the main board is OK then when the power switch is activated, there should be more than >2.5vdc on the POWER_ON pin, if not, the main board is no sending the signal which then we need to find out why.
You should read this training manual and get some understanding on how your TV function first, look at the Voltages as shown.
Learning to troubleshooting this complex circuits takes years of learning and understanding the basic first is a must.
Safety is my big concern right now.Last edited by budm; 11-23-2014, 12:26 AM.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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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,
TL;DR - this laptop is driving me nuts with the oddball power-related behaviors. Appreciate any insight you can provide!
I'm experiencing a power issue on an Asus Probook P5440UF-XB74. Although I've worked with electronics and computers for decades, this is my first attempt at getting into motherboard-level component troubleshooting. Any help the community can provide is greatly appreciated!
A few weeks ago I was using the laptop (on battery power) for a Zoom meeting. The battery was running very low (long meeting) but I wasn't worried about... -
I have a Sony Bravia KDL-40V2500 that will not power on. The indicator flashes red 3 times.
I do not hear any sound and I cannot see any backlight.
I have tried disconnecting every cable on each board one at a time to see if anything changes.
The only change is when I disconnect AC-DET cable on the Power Supply board or on the other end if I unplug the CN7009 connection on the B-Board and try to power on the TV the indicator will stay on solid green until I power off.
My friend ordered another used power supply board but it is also doing the red indicator flash 3 times... -
Machine won't power on, no power led, no fan spin, completely dead.
Checked PQ5400 - AONS32314 and pins 5,6,7,8 are 20v (AC adaptor voltage) but pins 1, 2, 3, 4 are 0v.
Following Gate Pin 4 to PU5400 - BQ24780SRUYR.
VCC 20v
ACDET 2.8v
ACDRV 0v (goes to pin 4 gate of AONS32314).
ACOK 0v
REGN 6v
According to datasheet, conditions are correct for ACOK to be high but it is not.
Tracing ACOK it's connected to ACIN which is connected to a pin GPB0 of IT8227 but also shown as connected to +3VL via a 100k resistor...
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