Shows standby , powers on to white back lights come on 1 second and shut off stays powered on with no back light. Cannot see image with flashlight. No vizio logo.
Mainboard issue???
Mainboard issue???
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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... -
vizio e650i-a2 (LWJAOZBP Serial) led backlight flashes then turns off, has video (via flashlight) and audio.
panel: au optronics T650HVN05.4
72 led total on 12 strips, 6 led per strip wired in three groups of 24 (led driver board has three anode and three cathode pins)
link to datasheet: https://datasheetspdf.com/pdf-file/8.../T650HVN05.4/1
Vizio 56.04219.641G (liteon PA-3231-01WN-LF) Power Supply Unit
https://www.shopjimmy.com/vizio-56-0...-power-supply/
Vizio 55.75J01.001G (91.75J10.004G) Main Board... -
When I turn on the TV the backlights flash on for a second and go out, I get the Vizio logo on screen for that short time. It passes the flashlight test.
Will a bad backlight cause this shutdown or should I be looking at the power board.
CN301 CONNECTOR
Readings as follows
VLED1-1+ 125 volts then drops to 0
VLED1-1- 0 volts
VLED1-2+ 0 volts
VLED1-2- 109 VOLTS THEN DROPS TOO 0
VLED2-1+ 105 volts then drops to 0
VLED2-1- 0 volts
VLED2-2+ 0 volts
VLED2-2- 130 volts then drops to 0
CN201 reading seem... -
Hello Everyone ,
today I'm coming to you regarding my issue which is no Backlight .
I have image on my screen but no light .
The macbook was one that I bought few month ago that I used with an external screen . Now I started to do some analysis on the MB which my limited knowledge .
First thing is that it suffered from liquid damage . The fuse was not ok when I openned it the first time . But I already changed it after testing that there is no short to ground on this line .
Please find below few informations which can help for the analysis... -
Hello friends,
I have this unit with no backlight on screen. After inspection i determined there is a shorted capacitor on BKL_BOOST circuit. I removed the capacitor, short is gone but backlight still not working. I found that Q9702 is not open and R9721 is only around 70kOhms but according to schematics it should be 301k. I removed the resistor and connected the gate of Q9702 directly to GND. Now i have 12v passing by the mosfet to turn on backlight IC LP8561 (U9700) but BKL_BOOST circuit is not working. I can measure only 12V there but it should be around 60V.
Can you...
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