Re: Toshiba LED TV, blank screen
All the parts I bought were second hand, but from "working" units...will try and look for a new PSU.
MDluffy
Member
Last Activity: 06-28-2014, 12:55 PM
Joined: 02-22-2014
Location: greenville, sc
-
Re: Toshiba LED TV, blank screen
5 for 5...when TV is on, screen blank but can hear sound and use controls - pull the AC plug, wait 2 sec, plug back in (nothing else) then the TV will come back on with screen working...if I cycle power with the remote control, it screen will not turn on....Leave a comment:
-
Re: Toshiba LED TV, blank screen
More than likely... I also found the setup that auto-shows in native format... seems like all the channels are now in HD and full screen... So yesterday, after an hour or so, the screen goes blank. Today, on power up it was blank (with sound and control). Cycled power twice with same result. New observation though... instead of using the remote power button, I unplugged the outlet from the wall and plugged back in... it came up fine!? Will try a few more times to see if this is a fluke or not. Thanks MDLuffyLeave a comment:
-
Re: Toshiba LED TV, blank screen
FW update - well, finally got the FW update working... definitely helped that I could see the screen in order to select 'yes'... learned something maybe useful to others... initially used a usb hanging around... didn't work. It was 8GB and formated NTFS. Found an older usb, 512MB (website said 256MB min) and formatted FAT32. bingo, worked like a champ. results? time will tell, although I have to now figure out how to get the channels happy... some are proper aspect ratio for 46", and other channels seem stuck on low quality with view not going...Leave a comment:
-
Re: Toshiba LED TV, blank screen
Well....got myself an "SSL 460_3E1B" inverter board..$40 from Aliexpress...website seems very reasonable, only a long delivery time... installed what voila! the TV is working!! but hold on.... wanted to make sure, cycled power a few times and once it came up with sound but no video... cycled power again and all seems ok... left it on for several hours, and then blank! with sound...tv status has a new parts (inverter, main, tcon). Something is going on... since I can get a screen working (most of the time) will try the FW update again......Leave a comment:
-
Re: Toshiba LED TV, blank screen
Finally found more time to experiment... to no avail... current status - same symptoms (after red Toshiba, screen goes from gray to black/blank); changed both main computer board and tcon with no change in symptoms....Leave a comment:
-
Re: Toshiba LED TV, blank screen
Got the control board. Only challenge swapping out was the disconnecting and reconnecting of the connectors....Need to take great care and not tug on wires. CN11 the small ribbon cable for touch keypad is tiny! and very difficult...with some assistance, finally got them swapped. No change in symptoms
Moving on to TCON replacement, just purchased on ebay $19... Will keep you posted.
MDluffy...Leave a comment:
-
Re: Toshiba LED TV, blank screen
Well, followed the instructions, but since the screen is blank, not really sure if I initiated the load...never saw the light on the USB flicker, couldn't tell from any other observations if it loaded or not. When instructions said to use the right and left arrows to select yes to load, I first just hit enter hoping it defaulted to yes, then again with a single right arrow then enter etc... really didn't get anywhere.
So for heck of it, found a control board on ebay. $43usd, free shipping... Figure that the picture circuitry could be working...Leave a comment:
-
Re: Toshiba LED TV, blank screen
My bad... the link clearly shows the U1 model! Will try and report back. Thanks....Leave a comment:
-
Re: Toshiba LED TV, blank screen
Interesting... I was searching for "46L5200U1" which shows no drivers available, but when I searched "46L5200U" it did show drivers available as you replied. My TV nameplate indicates the U1...I will dig in to see what the difference is, unless someone here knows. Thanks for your patience and assistance. MDluffyLeave a comment:
-
Re: Toshiba LED TV, blank screen
Hello, I've googled quite a bit and have had no luck finding FW or SW for this model toshiba, 46L5200U1....any ideas on where to look? Thanks!!Leave a comment:
-
Re: Toshiba LED TV, blank screen
Thanks, will give it a try and report back. MDLuffyLeave a comment:
-
Re: Toshiba LED TV, blank screen
Heating up - used hair dryer to heat up the TCON, I did not remove the metal section as it looks rather tricky to re-assemble, but pointed the dryer down the side. Seemed like good bit of warmth getting in there; No change in symptoms.
Unplugging main board leads - the toshiba logo did not come up, but screen did turn gray for a moment as it has been doing, then to black. reconnected leads and toshiba came up as has been, no change in symptoms.Leave a comment:
-
Re: Toshiba LED TV, blank screen
After power up, the big red toshiba letters come up fine, and they are on a light gray background (this has never failed...it always shows the red toshiba). After a few seconds the toshiba goes away, the gray turns to dark black. Used a flashlight and could not see any faint image or grayness at all...Leave a comment:
-
Re: Toshiba LED TV, blank screen [46L5200U1]
Here are pictures of the boards. I could not see any obvious vented caps, or other damage. Thank you for any help you can offer. MDluffy...Leave a comment:
-
Re: Toshiba LED TV, blank screen
My apologies, I thought I had put in the TV section.
Thank you. Will try to by next weekend. MDluffyLeave a comment:
-
Toshiba LED TV, blank screen
To all:
The TV was working fine, just over a year old. Turn it on one day and the screen is blank. Here are some observations. turn on tv, front small power on green light is on, the red toshiba name comes up and can see fine on a dark gray background. the toshiba goes away, and the screen turns from dark gray to black/blank. Can still hear sound, channels work, input selection works, on/off works, but screen is blank. Changed input to dvd (by guessing at the menu choice since screen bland...), same results. TV model is 46L52000U1. I've disconnected from AC (left for hours), and powered... -
Re: New Members - please post your introductions here
Greetings!
My name is Jamie. I have an electrical engineering background, but have been working as a project manager for so long I feel I've forgotten everything.... it is humbling and frustrating, but I'd much rather ask than pretend to know
I stumbled upon this forum while googling ideas to fix my led tv... This is looking like a great place to learn!
Thanks.Leave a comment:
No activity results to display
Leave a comment: