Okay guys ill try to make this short. I bought a 46in sony from a pawn shop.. I knew it wasn't working but got it cheap.. I plugged it in nothing happened no led light no nothing so first I looked for the schematics and found out the mainboard was defected so I found one put it in and it turned on for bout 5 sec backlight came on. Then all of a sudden it shut down and the standby light started blinking twice.. So I looked at the schematic it say 2 blinks mean its a OVP(overage voltage protection)problem. From my knowledge ovp has to do with the power ic in the power board so I changed the power ic nothing happen so I just decided to buy another power board and still nothing happen im getting frustrated.. when I bought the mainboard I knew it needs a firmware update I have it on a usb stick but cant get the tv to turn on to recognize it...Guys I have 2 power boards and 2 mainboards (in this tv its a G board and a B board ) I do believe the power board is fine I think its a firmware problem but I cant get it to recognize the usb please help anybody
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Re: sony bravio kdl-46ex723
what happens when you unplug the Tcon board and power up?Proud owner of dozens of broken TV's and many,many,many boards.
Our website and passion:http://hollenhundshepherds.com/ -
Re: sony bravio kdl-46ex723
Since it won't start up don't you have to force the update somehow on these? I forget how it's done but on some other Sony models I remember it has to be on a MemoryStick card and you had to hold some key down while powering up. Sorry can't help moreComment
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Re: sony bravio kdl-46ex723
unplugging t-con board same thing two blinksComment
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Re: sony bravio kdl-46ex723
I know they are different way to put update firmware on the flash memory by a isp programer but has never done it in the past so not sure exactly how to do itComment
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Re: sony bravio kdl-46ex723
Check or replace r6541/r6542 and r6537/r6538 all are 2meg 1/2 watt and 1 watt. This is for 2 blinks.Comment
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Re: sony bravio kdl-46ex723
were do you see those resistor cause I looked every where and couldn't find itComment
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Re: sony bravio kdl-46ex723
I need to update my firmware has anyone here put new firmware on the flash memory thru a isp programmer if so let me know what kind of programmer you use and the accessories its not updating thru the usb stickComment
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Re: sony bravio kdl-46ex723
Not sure if Sony has this but on many Sharp sets you can hold down the power button for like 10 seconds and clear an overload fault.Comment
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Re: sony bravio kdl-46ex723
tried that it dosent workComment
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Re: sony bravio kdl-46ex723
I have the same problem , what's the solution for Main Power Over Voltage Protection?Electronic Engineer from Syria,AleppoComment
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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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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, this is my personal laptop, which the original board (lets call it Board A) blew up PU8700 (TPS51486), making a hole on the board, i had left the laptop at my desk one day with the battery fully charged and didn't touch it for a week, but when i tried to turn it on it didn't
Thought the battery was dead, so i plugged in the charger then tried to power on, the power LED blinked once, charged LED still orange, unplugged the charger, plugged in again and I noticed the "magic smoke" smell, so i unplugged the charger, removed the back cover and saw the blown IC (the "magic... -
Hey guys great forum glad to have found it. I bought a Sony XBR 65X900C cheaply because it didn't work. No signs of life at all not even a light/led. All I hear is a brief high voltage sound when I throw the power to it.
Didn't see any obvious signs of damage so right away started checking voltages. This is what I see:
Power Board Connector that goes to Main board
CN6401
Pin 01 NC
Pin 02 NC
Pin 03 "BL_ON": 0V
Pin 04 "N/C"
Pin 05 "STBY 3.3V": 3.5V
Pin 06 "GND": N/C
Pin 07 "AC_OFF"... -
Hi everyone, newcomer in this forum, i watched tons of video from Sorin, i like the way i calmly explain things, i did quite some console repair, i am not that bad at micro-soldering, but troubleshooting where the issue is, is definitely where i still have progress to make. Usually i was able to fix the console because the failure was obvious, or because i was able to find someone with similar measures on the board and was pinpointing what to replace that way.
Nevertheless, let's say, i don't come as a total beginner.
I have this old laptop, which suit perfectly my needs, with the... -
Hi there!
I have a Sony Bravia KDL-40Z4500 which shows a colored vertical stripes pattern when turning on, with a central black shadow that slowly dissipates within the first 10 seconds.
Photo of the situation after the black shadow dissipates:
After this behavior the red LED will blink 9 times, then pause for a bit, and blink again 9 times, in a loop.
I checked the manual (available here) and this corresponds to "HFR error", quoting from the manual:
> This indicates HFR Communication error. [ HFR Communication...
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