The fault is with its video output stage circuit. The fault is called "one color predominant' screen. In most cases, this might be to a loose solder terminals at the video output stage circuit board. This board can be located at the neck of the picture tube, will plugged on to it directly. If you wish to get more details, check this link. http://electronicshelponline.blogspot.com/ Selecting the view option, either to Mosaic
/Timeslide, can be selected by the drop-down list, by the top left
of the display window, will make surf easy. You can also do a search, by type in the brand name / model
number / IC used, in the search box at the top right of the display window.
The symptoms you describe is the main processor controller is about to fail, when that happens the tv will eventually become unuseable. if the set is more than 5 to 10 years old you will be further ahead to replace the set.
Is it while watching cable TV? It could very well be hum-bars which is caused by a grounding problem. Adding a ground to your cable splitter or lifting the ground at the TV (using a ground breaker) can solve this.
If it got like that gradually suspect a low emission condition on the Blue gun inside the picture tube, this condition can sometimes be fixed by running a gun cleaning procedure, this is done with a crt analyser device at a repair shop. The other cause for a no blue picture could be a Blue color output that has stopped working, the loss of blue is suddendly when the color out fails, it could also be a problem in the signalprocesing circuit. I suggest having it checked by a tech because it would be something you could not check, first because of lack of equippment and second, you would need some technical troubleshooting skills to do the job.
Take the TV to a TV repair person.Don't try to repair it yourself if you have no idea how to.I know it's probably not the answer you want to hear but sometimes it's best to let a qualified electronics person fix things.You know it's fixed right and you don't have to risk your life.
Could be a horizontal output fault, faulty power supply, a simple dry solder joint or HVT. If you can hear arcing or smell an ozone odour, it will be the HVT which may cost a bit.
Without knowing the actual cause, it's impossible to say how much it would cost to fix it.... could be anywhere from $50 to $250 etc
Best to have it checked by a technician and get a quote to repair... then decide if you think it's worth it.
Toshiba is generally a reliable brand, so if you were happy with the picture quality before the fault occurred, it's probably worth repairing.
Do the same remotes function normally ion other Toshiba TVs? Why don't you chech this out first? There is no possibility of the TV causing the above symptom. I can only think that you are using expired batteries.
Before condemming the infared remote receiver, make sure that you have tried and original toshiba
remote control. Sometimes universals do not always
work. If you do have to replace the (IRR), the main circuit board or the button assembly must be removed. The part is soldered in and has only three wires. The approximate cost of the part is around $20. You local service center would probably charge you $80 to $100 for the repair.
If you have already tried a number of universals,
the chances are that the(IRR is defective). Also try the code search on the universal remote sometimes this will work. Scrivitron
Your problem is most likely caused by a cold solder joint in the vertical circuit. Normally this is easy to find and correct. The problem will only get worse over time, but not likely for more damage to occur.
This manual is avail as a download at http://www.servicemanuals.net The first thing I would check would be the STR regulator IC in the main power supply, that is if the standby supply is good.
This is a known issue with this TV. The following might resolve it:
Check Mute and Volume:
Ensure that the TV is not muted and that the volume is set appropriately. Sometimes accidental button presses can lead to muted sound or low volume.
Inspect External Speakers:
If you're using external speakers, verify their connections. Loose cables or faulty speakers can cause sound issues.
Test Different Inputs:
Connect a non-HDMI device (such as a DVD player) to the TV. Observe if the sound distortion occurs. If it doesn't, the problem might be related to the HDMI signal from your Virgin box.
HDMI Troubleshooting:
If the issue persists with the DVD player over HDMI, consider the following:
HDMI Cable: Check the HDMI cable for damage or loose connections.
Virgin Signal: Contact Virgin to inspect the signal/lines and replace the box if necessary.
Mainboard Replacement (if needed):
If the sound distortion persists, it could be due to a faulty sound processor chip on the TV's mainboard. In this case, consider replacing the mainboard.
TOSHIBA 42RV500E, 42RV500T, 42RV500Y, 46RV500E, 46RV500T User Guide (manualmachine.com)
There may be loose contact or track open in main board.So try to check the main board thoroughly where you may find the loose of connection or track open.
Locate the Battery Cover: Look for the battery cover on the back of the remote control. It is usually a small compartment that can be easily opened.
Remove the Battery Cover: Depending on the design, there may be a latch, screw, or sliding mechanism to secure the battery cover. Use your fingers or a small screwdriver to open the compartment.
Remove Old Batteries: Take out the old batteries from the battery compartment. Pay attention to the orientation of the batteries, so you know how to insert the new ones correctly.
Check Battery Polarity: Take note of the positive (+) and negative (-) signs inside the battery compartment. Make sure to insert the new batteries with the correct polarity to match these markings.
Insert New Batteries: Place the new batteries into the battery compartment, ensuring they are properly aligned with the correct polarity. Press them down gently to make sure they are secure.
Replace Battery Cover: After inserting the new batteries, close the battery compartment cover securely. If it has a latch or screw, make sure it is fastened properly.
Test the Remote: Point the remote at the device it controls (such as a Toshiba TV) and test whether it responds to your commands. If the remote is working correctly, you have successfully replaced the batteries.
Dispose of Old Batteries: If the old batteries are no longer usable, make sure to dispose of them properly. Many communities have designated recycling locations for batteries.
