protonusr22
Member
Last Activity: 02-17-2024, 06:23 PM
Joined: 11-14-2022
Location: Oradea, Bihor
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Hello guys,
In the meantime I have tried an other quick and dirty trial for fixing this tv. Indeed, one of the backlight leds are gone. On the driver board there is an error detection pin that goes straight to the logic board. If I pull this line down to the ground (I assumed it is safe because it is an output of the led driver and it has a series resistor already on the board). Now the tv passes the self test and runs smooth without resets or any kind of glitch. Fortunately the defective led is on the bottom-left side of the screen and it is not visible during normal operation (eg. watching...Leave a comment:
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is there somewhere a schematic diagram available? i could not find any :/...Leave a comment:
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Hello,
EasyBone: I have attached the pictures
Since last time I have tried the "easy" solution I have found on youtube, cutting and grounding the BL_ERR pin but no success. When i first started up the tv with this modification it booted up and stayed in the language selection menu for 2-3 seconds, than the 4 red blinks.
Edit: " *I have tried to find the schematic of the led driver board but with no results. - also, i have tried to unplug the ribbon cable on the right side of the board that goes to the main logic board - the tv still boots...Leave a comment:
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Thank you!...Leave a comment:
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Thanks for the answer! So you suppose one or more leds in series are in short/open?...Leave a comment:
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Sony 49XH9505 four flash of death
Hello,
I own a Sony 49XH9505 123.2cm Smart Android 4k quite new bough brand new in 2021. Just after the warranty has expired it had died on me.
The symptoms are the following: right after turning on backlight turns on and this loading screen appears, than the display turns off and the red led flashes four times.
Any idea how to fix it or if it at least fixable? Does this sign related maybe some SoC/DSP and its circuits or just some simple power supply issues somewhere ?
Many thanks in advance, -
Hello Guys!
I am an both an electronics enthusiast and currently working in the automotive hardware design field. Thank you!Leave a comment:
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Re: Schematics&Boardview MacBook Pro 16" A2141 820-01700
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