Old Thrashbarg
02-12-08, 08:45 PM
I just came by a Samsung 173P that isn't working. I did not actually see it fail, but the report is that it was working perfectly fine, idling in Windows or whatever, and then it suddenly just went black. This is assuming, of course, that I'm getting the full story.
Normally I'd just write it off as a dead backlight and move on... however, this particular circumstance seems a bit odd to me. This thing has two separate bulbs for the backlight, top and bottom, and the inverter board is essentially two separate circuits (on one board, though), with each bulb having its own transformer and such.
I wouldn't think that both backlights could just suddenly and completely fail like that. Usually they'll flicker, or go dim, or otherwise partially fail first. I also can't find any evidence of any failed componentry... usually there'd be at least a scorch mark or a dodgy-looking component somewhere, but everything seems perfectly in order. It's more like it's just not getting a signal to turn the backlight on.
Anyone ever had an LCD do this?
(And I did verify that the panel works... it's barely visible when I shine a flashlight directly onto it.)
Normally I'd just write it off as a dead backlight and move on... however, this particular circumstance seems a bit odd to me. This thing has two separate bulbs for the backlight, top and bottom, and the inverter board is essentially two separate circuits (on one board, though), with each bulb having its own transformer and such.
I wouldn't think that both backlights could just suddenly and completely fail like that. Usually they'll flicker, or go dim, or otherwise partially fail first. I also can't find any evidence of any failed componentry... usually there'd be at least a scorch mark or a dodgy-looking component somewhere, but everything seems perfectly in order. It's more like it's just not getting a signal to turn the backlight on.
Anyone ever had an LCD do this?
(And I did verify that the panel works... it's barely visible when I shine a flashlight directly onto it.)