My tv still has backlight when turn on, 12v on tcon board but no picture and 6 flashing red light at power button. I already disconnected each ribbon cable in turn but the screen only had backlight and nothing changed.
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Re: HISENSE H55B7500UK has backlight no picture
Update photos and clip(gg drive)
https://drive.google.com/file/d/1SeU...w?usp=drivesdkAttached Files -
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Re: HISENSE H55B7500UK has backlight no picture
Turn it on, look closely at it with a flashlight, hit menu button, see if you see any text on screen.Comment
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Re: HISENSE H55B7500UK has backlight no picture
LOL.... why flashlight and he have BL working fine ...!!
you need to test T-CON and Panel as stand alone first..
disconnect the LVDS from T-CON side.... if the BL come on... then make Jumper from PSU 12 V to T-CON fuse direct... see if the screen lighting up...with full colorComment
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Re: HISENSE H55B7500UK has backlight no picture
LOL, my bad Diah, I think I got it confused with this pos sanyo one board I'm fooling with.Comment
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Re: HISENSE H55B7500UK has backlight no picture
you don't have any u ribbon cable... did the tv after blinken stay at blue led on ???? if yes try feed it with HDMI signal from HDMI port with remark of CEC to check if there any soundComment
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Re: HISENSE H55B7500UK has backlight no picture
i saw your movie.... try to disconnect the WIFI BT module and turn on.. if the same issue you have issue at MB.. emmc dead or Firmware ... try to write firmware again via USB... am sure 5V at USB you have because T-CON 12 V you have measured before... if this didn't help then replace MB or packing it LOL if u have BGA station then refleo main CPUComment
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Re: HISENSE H55B7500UK has backlight no picture
go hard play on MB.. check any low volts you have for emmc or DDR or cpu.... if all fine...take out the heat sink.... and do what you can to heating the cpu to touch again in it place if you did trying flashing the firmware.... good luckComment
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Re: HISENSE H55B7500UK has backlight no picture
I used heatgun to heat cpu in 2 mins and nothing happen.
Can u give me the firmware to try flashingComment
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Hi guys! I realized you have a lot of knowledge here so i am hoping you could point me in right direction with my odd issue.
The Tv is a Philips 58PUS8545/12, it had no picture but working backlights.
Original T-con:
Opened the Tv and tested to unplug one ribbon cable at a time. With this test i could see that i got fine picture on both halves as long as there was only one ribbon cable connected, with two connected picture were gone.
First replacement T-con:
I thought it might be t-con and ordered new t-con from china(supposedly tested)... -
this tv is throwing me for a loop. do samsung tvs no longer have the backlight self test feature built into the power supply?
i tested the backlight with my LED tester and it lights up both strips. one of them reads 100v and the other reads 63.7v.
unplugged mainboard from power supply but left backlight plugged in, and then plugged psu wall power in. expected to see backlights light up but see nothing.
according to how ive diagnosed in the past, this would almost always be a bad power supply. replacement power supply was cheap like 20$ from ebay. but still i get not even... -
Quick repair summary for those interested. I had a Hisense 58R6E3 TV that had backlights working but no picture. T-Con had 12V supply but some of the supplies on the board were 0V. Unplugging one of flat cables to the LCD display driver boards brought the supplies back up, so I figured it was a short on the LCD panel driver board. Narrowed the short down to the 15V power supply by checking the coils on the T-Con board to ground with a diode test and confirmed that all the MLCC caps on that rail all showed a short to ground. I injected 5V/1A into the 15V rail on the driver board (T-Con disconnected)...
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I have a 60 inch Samsung UN60EH6000F flatscreen TV. The screen went black a few months ago Sound is good, backlight is good, no menu. I replaced the TCon board with a used board purchased from Ebay. It worked fine for a 3-4 months, then the screen started ‘fading' back. Once again, sound is good, backlight is good, no menu. However, this time the picture looks fine for about 10-15 minutes, then fades back. If I power cycle the TV, the display reappears, for another 10-15 minutes, then fades black again. Repeatable ever time.
I ordered a supposedly ‘new' Tcon board this time, and... -
Hello everyone,
Ive got a UE60KU6079 on the workbench that is giving me some headaches trying to troubleshoot.
The previous owner stated that there had been white dots on the screen which from the description sounded like some lenses fell of the backlight LEDs.
He had opened the TV from the back, trying to get to the backlight, supposedly gave up, reassebled everything and gave the TV to me.
I expected the worst like ripped COF cables or a cracked panel but could not find anything like that yet.
Anyway I still fully expect that there has been something seriously damaged...
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