Hello,
First off, I am a noob to this forum. Sorry for immediately begging for help.
I am experienced with vacuum tube technology, and have restored a number of those older sets. I'm new to LED/LCD technology.
I picked up a Toshiba 55L310U Rev. A from the side of the road. I took it home and it was completely dead. Would not respond at all. Could not see any obvious physical damage to the screen or any parts. the set was completely clean (no dust or anything) and the screen bezel still had the plastic film on it. It looked basically brand new. The power cord seemed to be wrapped and secured with a cable tie. The remote and user manual was in a plastic bag taped to the back of the set.
Opened it up, and found one of the electrolytics on the power board was bulging. Replaced that and the rest as a precautionary measure with the exact same value.
The set now responded when pressing the power button by:
1) Flashing the standby light 3 times.
2) Illuminating the backlight in a sequence of "Bright" for about a second, "Medium" for a second, and then "Dim" for a second.
After that, the set sits idly, with the backlight on "dim."
There is no logo on screen, or any picture. I can't test audio, because I don't know the menu, in order to find an active input.
After about 5 minutes sitting in this state, 4 very faint grey vertical bars appear on the left side of the screen.
I can't find a schematic, so I decided to fire up the parts cannon. I ordered a supposedly working power supply board and installed it, thinking that maybe something else on that board was wonky. No change.
Frustrated (I'm sure we've all been there) and leaving for a work trip, I just fired up the cannon again and ordered a main board. It arrived and I installed it. No change. I'm at about $80 in parts.
This is where I hope someone can help me. Again, I'm a newbie and don't completely understand this technology yet. It appears that I have a Tcon board that is part of the LCD panel. Is that correct?
Any tips or tricks to determining what the issue could be? I've searched the forums and can't seem to find any info that exactly matches what I have, and what I have going on.
Thank you very much. My kids are desperately begging me to get this set up and running!
Thanks,
MK
First off, I am a noob to this forum. Sorry for immediately begging for help.
I am experienced with vacuum tube technology, and have restored a number of those older sets. I'm new to LED/LCD technology.
I picked up a Toshiba 55L310U Rev. A from the side of the road. I took it home and it was completely dead. Would not respond at all. Could not see any obvious physical damage to the screen or any parts. the set was completely clean (no dust or anything) and the screen bezel still had the plastic film on it. It looked basically brand new. The power cord seemed to be wrapped and secured with a cable tie. The remote and user manual was in a plastic bag taped to the back of the set.
Opened it up, and found one of the electrolytics on the power board was bulging. Replaced that and the rest as a precautionary measure with the exact same value.
The set now responded when pressing the power button by:
1) Flashing the standby light 3 times.
2) Illuminating the backlight in a sequence of "Bright" for about a second, "Medium" for a second, and then "Dim" for a second.
After that, the set sits idly, with the backlight on "dim."
There is no logo on screen, or any picture. I can't test audio, because I don't know the menu, in order to find an active input.
After about 5 minutes sitting in this state, 4 very faint grey vertical bars appear on the left side of the screen.
I can't find a schematic, so I decided to fire up the parts cannon. I ordered a supposedly working power supply board and installed it, thinking that maybe something else on that board was wonky. No change.
Frustrated (I'm sure we've all been there) and leaving for a work trip, I just fired up the cannon again and ordered a main board. It arrived and I installed it. No change. I'm at about $80 in parts.
This is where I hope someone can help me. Again, I'm a newbie and don't completely understand this technology yet. It appears that I have a Tcon board that is part of the LCD panel. Is that correct?
Any tips or tricks to determining what the issue could be? I've searched the forums and can't seem to find any info that exactly matches what I have, and what I have going on.
Thank you very much. My kids are desperately begging me to get this set up and running!
Thanks,
MK
Comment