Re: Toshiba 50L7300A turns on then blue screen
[url]https://imgur.com/a/wdqRLEI[/url]
This^. Basically when I plug it in, the light turns green, logo splash occurs normally, followed by a couple of seconds of black, then blue indefinitely.
The four buttons on the back panel haven't yielded any results or response. The Vol- button is used for the FW upgrade but that process didn't work. The source/menu button hasn't had any effect, and even the power off button doesn't do anything once the TV is on.Re: Toshiba 50L7300A turns on then blue screen...
Woollyentity
Member
Last Activity: 05-12-2020, 06:09 PM
Joined: 04-11-2020
Location: Melbourne, Victoria
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Re: Toshiba 50L7300A turns on then blue screen
This is way more in-depth. What are the differences between the LG's symptoms and the video I originally posted?
I'll have a go with my multi at recreating some measurements, thanks again.
With any luck I'll be able to get as specific a diagnosis as yours!...Leave a comment:
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Re: Toshiba 50L7300A turns on then blue screen
Tried with just the .fwu, USB formatted to FAT32, exactly according to the instructions that came with the software download. Still the exact same result.
After connecting it to power, I've tried using the on/off button on the back panel and the TV stays on. As part of the FW upgrade is holding down the Vol- button. Is it possible all four buttons are just not properly connecting?
All advice greatly appreciated.Leave a comment:
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Re: Toshiba 50L7300A turns on then blue screen
Is exFAT okay? I googled and apparently it encompasses FAT32 and others or something.
Otherwise I can try a different flash drive.
I assume the single file in question is the .fwu file alsoLeave a comment:
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Re: Toshiba 50L7300A turns on then blue screen
Yeah power board looks fine visually, that is glue under the capacitors, nothing obviously out of place.
Checked the connectors too, all seem to be seated properly.
Additional photos here, including T-Con and back panel info:
[url]https://imgur.com/gallery/OrchEsT[/url]
List of details:
TV Model - 50L7300A
Power board - N255A001L (or "N12-225P1A"? Visible under barcode in photo of PB)
Main board - 32L4300 Rev: 1.02A
LED Driver board - L50086-2EA...Leave a comment:
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Re: Toshiba 50L7300A turns on then blue screen
Tried it, held it down, pressed rapidly, at different intervals, startup happens the exact same as in original vid. I was using the button under the volume buttons, not even sure what that is but I assumed it had the most to do with this. Also the top power button doesn't work at all so is it possible the buttons just aren't connected at all?
Removed the rear panel and took a bunch of photos.
[url]https://imgur.com/a/dLyCKcg[/url]
Couple of reminders:
- I have no remote
- Haven't...Leave a comment:
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Re: Toshiba 50L7300A turns on then blue screen
Yeah the TV was like this already.
I have a multimeter and I'd like to learn to be able to check voltages but definitely not completely confident at the moment.
I could try disconnecting the backlight although the TV hasn't been responsive to anything and I have no remote.
Is the T-con the other of the three largest PCBs after the main and power boards?
Also never heard of the USB-UART but interesting.
I only intend on using the TV as a big monitor to watch movies played on my laptop anyway....Leave a comment:
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Re: Toshiba 50L7300A turns on then blue screen
fw downloaded from a site I found it on, can't remember which site but the download came with instructions as well. The version is v7.1.68.07.01.1. The instructions seem to have been issued by Toshiba so I followed them. Basically just formatted a USB, then put the .fwu file on it. Then I powered the TV off, inserted the USB, pressed and held volume down button, powered the TV back on, at which point the upgrade was supposed to automatically begin on the screen, which it didn't.
Haven't...Leave a comment:
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Re: Toshiba 50L7300A turns on then blue screen
Maybe I'll try that...Leave a comment:
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Toshiba 50L7300A turns on then blue screen
I have a second hand Toshiba 50L7300A which, when plugged in, turns on and displays the Red Toshiba logo, but then displays a bright blue screen.
I understand this may be a problem with the main board (32L4300 rev 1.02a) but I'm not sure, and they're very difficult to find now anyway.
I tried updating the firmware - the USB flashes a few times when plugged in, then nothing happens and the blue screen is still all I get.
I also have no remote for this TV.
Video of the problem:
imgur.com/a/wdqRLEI
If you've heard of anything similar please... -
Toshiba 50L7300A turns on then blue screen
I have a second hand Toshiba 50L7300A which, when plugged in, turns on and displays the Red Toshiba logo, but then displays a bright blue screen.
I understand this may be a problem with the main board (32L4300 rev 1.02a) but I'm not sure, and they're very difficult to find now anyway.
I tried updating the firmware - the USB flashes a few times when plugged in, then nothing happens and the blue screen is still all I get.
I also have no remote for this TV.
Video of the problem:
imgur.com/a/wdqRLEI
If you've heard of anything similar please... -
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Damn look at some of these smilies
I'm from Melbourne Australia and I like desoldering circuit boards to relieve the pain of knowing I'll never have adventures in Africa with the French Foreign Legion. Trying to fix a TV at the moment.Leave a comment:
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