Question about Toshiba 40H80 40" Rear Projection Television
I have a 5 year old Toshiba 40H80 HDTV that just was serviced and all three CRT Tubes (RED,GREEN and BLUE) were replaced and anode cables. The TV played perfect for the 5 years except for some faint "burn in" that the replacement CRT Tubes fixed. TV operated normal for two months and then there was a "POP Sound"....no picture or sound but after 10-15 minutes the Picture and Sound returned to normal. Now every time I turn the set on, I get sound as normal but no picture but if I wait 3 to 5 minutes I get a picture to show up on the screen (always RED at first) and then the picture becomes normal with all colors corrected. The TV then operates normally until I turn the TV off. I believe the problem has something to do with something thermally heating up and then coming on (picture wise) normally or a Time Constant for the High Voltage has been affected. The problem is with the TV and not my Cable Provider as I have disconnected the Cable source and the problem on the TV is still there. I cannot believe that it is a problem with the CRT Tubes because I cannot understand how a CRT tube could be bad at first and then become "normal" after 3-5 minutes of warm up time. Hoping that you have some suggestions for the problem and that it is fixable. My service contract has expired. Thanks.
Theres a high voltage block that all three of the anode leads attach to and sometimes a small crack happens across this block and will not let some or all of the crt's get the high voltage all at once untill it heats up a bit. now if this is not your problem i would make sure that all three crt sockets are attached to there tubes all the way as maybe justy maybe there loose and will only work after ther expand a bit. Now another problem that could cause this problem to occor origially would be that someone left off a crt ground strap and the crt arched and popped and caused the problem with the High voltage block. And no I cant see a tube being bad then comming on at first UNLESS when you say the red comes on is the picture all red with small retrace lines(small white lines)in the screen with no picture except for red???? No video only a red blank screen is what i mean. If thats what its doing then yes Ive seen heater to cathode shorts on a picture tube that would cause this problem but to be sure your really gonna need to have the set looked at.. Good Luck
Posted on May 17, 2006
A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Feb 15, 2016 | Televison & Video
Aug 28, 2011 | RCA P60920BL 60" Rear Projection...
Jan 05, 2010 | Samsung HLN5065W 50" Rear Projection...
Oct 18, 2009 | Mitsubishi VS-50502 50" Rear Projection...
Mar 12, 2009 | LG 42PC3D 42 in. Plasma Television
Jan 27, 2009 | Sony KP-46WT500 46" Rear Projection...
Sep 02, 2007 | Runco CL-410 Multimedia Projector
Apr 16, 2007 | Sony FD Trinitron WEGA KV-36FS120 36" TV
Feb 10, 2007 | Sony KP-51HW40 51" Rear Projection...
196 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: