Re: Sony 75X9400E TV.. 5 Red blinks
Yes my TV was EU 75x9400e. Replacement board belonged to a US 55x930e but it turned out this board was faulty (it was used from ebay) but had a functioning emmc. The replacement board gave me 8 red blinks, in general it means the mainboard is faulty. I almost gave up on the repair because t was getting frustrating and the tv was taking space in my bedroom. Nick has a lot of vids on youtube for different sony models and I have noticed most of times it's the emmc that craps out. So I decided to try one last thing, took both the boards to a mobile...
dumbdd
Member
Last Activity: 09-10-2023, 09:12 PM
Joined: 07-01-2023
Location: Dubai
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Sony VA panel burn in
I have a Sony 75x940e that I just fixed with the help of the forum (bad emmc). For the last couple of months I was noticing some burn in of the android home icons on dark backgrounds (photo is attached). I always thought VA panels were immune to burn ins. Is there anything I can do to fix it? Could it be because of a failing component other than the panel itself?... -
Re: Sony 75X9400E TV.. 5 Red blinks
My tv is fixed! Replaced the emmc on the original board and it started working (had to do the pairing).Leave a comment:
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Re: Sony 75X9400E TV.. 5 Red blinks
I got the replacement mainboard from 55x930e yesterday. With the replacement board installed, the tv tries to start (white led turns on and off multiple times for a minute or so) but ends up giving 8 red blinks. BMKP is the same for 55 and 75 inch models but the power boards are quite different. Some pins on the power header in 55" schematics are not connected or connected differently if we compare them to 75" schematics. I'm guessing I need to transfer the emmc from my old board to the donor board, that's pretty much the only thing...Leave a comment:
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Re: Sony 75X9400E TV.. 5 Red blinks
I think 4.5-5 ohms is a bit too low on those pins but then we both got the same value so I don't know. Not much we can do here until my replacement board gets here I guess.Leave a comment:
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Re: Sony 75X9400E TV.. 5 Red blinks
I think I might have found the issue in my case. C4602 and C4802 caps are giving me 5 ohm resistance. Probably means the upscaler chip is dead? Can you please check these cap resistances for me, I went through your board schematics and our boards are pretty much the same, even down to cap labels.
Did you try the usb firmware update to get an idea if your BKA is working?...Leave a comment:
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Re: Sony 75X9400E TV.. 5 Red blinks
I was trying to update the tv to the latest firmware to rule out any previous botched update I guess. So I copied the latest pkg file for my tv into the root of the thumb drive and plugged it into the top most port (USB 1) on the tv.
[url]https://i.rtings.com/assets/products/Y6ub97JO/sony-x940e/inputs-side-large.jpg[/url]
Then I turned on the power and there was some activity on the thumb drive led (also means REG_12V was up at this point). Turned on the tv and REG_12V dropped to zero, led activity on the thumb drive...Leave a comment:
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Re: Sony 75X9400E TV.. 5 Red blinks
Hey. Replaced the T-con, didn't make any difference.. Still getting 5 blinks just like you. In my case the soc and upscaler are on the same board (BMKP). I have pretty much arrived at the your conclusion, the bmkp is not turning on the power to the T-con.
I plugged a usb into one of the ports on the tv and then looked at the files on a pc, the tv had created a couple of standard Android related folders.. seems like soc is working fine. Could still be emmc corruption or some other faulty chip on the mainboard.
My tv...Leave a comment:
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Re: Sony 75X9400E TV.. 5 Red blinks
Some updates, tcon is supposed to get it's power directly from the power board through a dedicated connector (obvious in the pics) . TCON_ON is not being shorted to STBY_3.3V by the main board during boot up. I disconnected the power cable to the main board and jumpered STBY_3.3V to TCON_ON. TCON started getting 12.8V and VDD_3.3V on the tcon was stable at 3.3V. Leads me to believe that the problem might be with the mainboard.
I'm at a complete loss here guys, what should I do next?Leave a comment:
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Sony 75X9400E TV.. 5 Red blinks
I was using this TV for 5 years before it stopped working. I like this TV and would love to fix it myself.*
When I press the power button, the white led comes on (sony calls the module smart core) and then it switches over to 5 red blinks. No screen, no backlight, no relay click, nothing. I have disassembled the tv and found the service manual for 75x940e online. The manual suggests a faulty power board, TCON or the panel.**
The standby pin is at 3.3V. Fuses on the mainboard and TCON are fine. Caps on TCON also seem to be fine. When I turn on the tv the white led... -
Re: New Members - please post your introductions here
Hey everyone! I'm thrilled to join this amazing community. I'm a software engineer located in the Middle East. Recently, my Sony TV suddenly stopped working, and I'm hoping some knowledgeable individuals here can lend me a hand in preventing it from becoming e-waste. I would greatly appreciate any assistance you can provide. Thanks in advance!Leave a comment:
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