Re: KDL-46EX621---No Power/No Standby---Bad PS?
90% of sony psu boards are fuse or diode or thermal fuse resistors
90% of sony psu boards are fuse or diode or thermal fuse resistors
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Re: KDL-46EX621---No Power/No Standby---Bad PS?
I'm guessing that's the only issue but we shall see. Since it was a 4 blink code and that is a mainboard issue as well and now the flow chart is telling me mainboard issue, it probably finally just gave out which is why it won't power on now.
Seems the last time I thought PS and got the part, it was mainboard. I've only had PS issues when there was a short but I know that's not always the case but lesson learned I guess.Comment
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Re: KDL-46EX621---No Power/No Standby---Bad PS?
I have a quick question. I have this Vizio where half screen would go black, hit the top corner and it'll fix itself. Took it apart and I replaced the inverter board because a solder pad bridged with a pad on the component next to it and it was obvious this was the issue cause it was the top of the inverter, exactly where you would hit the side to get it to work. But now it's doing it again and slowly getting worse.
Could it be LCD or inverter(got it used from Ebay) I'll try and get model # later and pix of it but hoping someone may now off hand from experience.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: KDL-46EX621---No Power/No Standby---Bad PS?
So, after getting the replacement board in(found for 98 shipped!) popped it in and got some signs of life. After messing with it for a few and wondering why it wouldn't turn on(standby flashed 5), I took apart the Tcon cover and noticed the flex cables were disconnected from someone tinkering with it before me.
Got that situated and had the amber/green flashing lights. Downloaded the software update, popped it on the usb and it started right up to the software update screen.
Mainboard fixed the issue I was having for sure. Thanks for all the help BudComment
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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.
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Hi All,
Need help.
I have a samsung un60j620dafxza led tv. When I plug it in it has no display, no sounds, and no standby lights.
So I opened the tv and disconnected the power to the mainboard and the backlight powered up. This according to many people says that this is a mainboard
problem. I checked the voltage coming from the stb and I read 1.3 volts on pins 1,3,5 and 7 which are low volts instead of 13 volts which i think the lcd panel
might be drawing too much power from the power supply that it prevents the right voltage going to the mainboard.... -
Dear all,
I have taken out the motherboard of a Acer TravelMate P214. There is a short to ground on the main power rail (19V). I don't have the schematics or boardview for this board (DAZ8IMB1AA0 REVA). But I have found 4 MOSFETS close to the main power rail : 2 N-Channel and 2 P-Channel.
I have checked resistance across each of the 4 MOSFETS. I have the following readings:
Both N-Channel Mosfets: nothing odd
P-Channel MOSFET number 1:
source - drain : 117 kOhm
source - gate: 96 Ohm
gate - drain: 117 kOhm
P-Channel MOSFET... -
ONN 100012588
Issue: No Power, Then Rebooting After Main Board Change
Short answer: replace main board and power board
Technical answer: replace main board and Q306 & Q307 on power board.
Long answer:
TV wouldn't turn on. Power switch was fine which means the main board isn't processing the power on signal. Replaced main board. TV turns on now but randomly reboots. Bad main board? EEPROM? Tried to pull main board and got a shock touching the corner of the board. That's weird. C334 (450V 10uf) capacitor is still holding a high charge.... -
Hello, I have a problem with my Samsung UE48H6410SSXZG with the main board BN41-02156A and the power board BN44-00709A. Everything seemed like this, the TV could no longer be switched on, the standby LED always flashed 5x2 times. Backlight was off and no sound from TV. Also made the flashlight test and there was no picture.
I made the following tests:
1. Disconnected the main board from Power Board = backlight works.
2. Connected the main board and disconnected the T-Con = backlights does not work.
So I ordered a main board from Ebay also BN41-02156A but from...
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