Hi,
There are no bulbs in rear projection TV's, there are only 3 CRT tubes which project a picture on the screen. The bulb your referring too is that from a DLP projection TV which is a very different technology than rear projection. Since you have a rear projection TV that has audio but no image this means there's a problem with the TV's HV deflection. Here's a list below of the possible faults:
Bad fly-back transformer
Bad HV splitter
Bad Convergence IC's
Bad Horz/Vert output transistors
Cold solder joins along convergence area
Its best to get a professional to resolve this for you as rear projection TV's hold a deadly charge even when unplugged. If you don't discharge the flyback / tubes, the charge can kill you in less than 1 second.
http://tvtechwork.webs.com/
Your projection tv is of a CRT type ; as such it doesn't have a lamp - the image is generated by its own 3 CRT's. If one of them failed then the entire unit is good for the skip.
To clean the lenses of dust just use a can of compressed air. If other dirt has entered them then the entire optical unit is compromised - junk the tv. Realignment can't be done at home. Special signal generators and image analysers are needed - the tv must be taken to a shop.
Heat is the enemy of electronics, and these sets
operate hot. You might wish to unplug the TV for an hour or more. If
this power reset does not allow the TV to turn on component failure is
indicated. These sets are assembled using the wave soldering process
they are known for having cold solder connections. The safety circuitry
shuts the TV set down when it detects a problem. This model of TV has
over 3,000 parts which include millions of transistors inside the
integrated circuits. The capacitors will change value, leak and become
defective. Resistors will change value and burn. Integrated circuits
and transistors can go bad. This can cause other components to become
defective, which can have a domino effect and cause other parts to
fail. Replacing one defective part may make the TV operate for a short
time but the part will fail again since if the parts that caused the
failure to begin with are not replaced. The only way to know for sure
what is causing the problem, which parts that are no longer within
factory specs and for proper repair all the electronics must be
diagnosed by someone with the correct electronic test equipment and the
skills to use the test equipment. I wish I could tell you there was a
quick fix or button to push that would fix the TV but that is not the
case or the solution needed to get the TV operating correctly.
If you wish to repair it yourself what type of electronic training do you have?
What type of TV test equipment do you own?
Do you own and know how to operate an oscilloscope?
If
you decide this is not something that you can do I expect this repair
will be about $250 to $450, depending on how many parts are found to be
out of factory specifications, if the problem is a bad circuit board,
and if the board can be repaired or has to be replaced. A small TV
repair shop will often charge less for the repair than a large
electronics repair facility.
Thanks for using FIXYA
If you forget the code, you can view the locked TV without entering the code.
To do this, simply press the buttons on your remote labeled "QV" and "9" at the same time whenever your secret code is requested.
NOTE: These button should be pressed exactly at the same time whenever your secret code is requested.
IMPORTANT:
Unlocking with this procedure is only temporary. To cancel the lock completely, follow the procedure below
1) Turn on your TV. If the TV requests your secret code, press the "QV" button and the "9" button on the remote control at the same time.
2)Press the MENU button to view the main menu. Use the ADJUST button to select "Advanced" Features". Press ENTER/EXCH.
3) Use the ADJUST button to select "Use Parental Lock". Press ENTER/EXCH.
4) Press press the "QV" button and the "9" button on the remote control at the same time, instead of entering the code.
5) If you were using "Lock the TV", the lock must be turned off. Using the ADJUST up/down buttons, select the "Off" setting.
6) If you were using the "Lock the Channel", use the ADJUST up/down buttons to place the cursor next to the channel whose lock you want to turn off. Press ENTER/EXCH.
7) Press the CANCEL button to unlock that channel or use the ADJUST up/down buttons to change the channel to a new one.
8) Press the MENU button to return to the "Advanced Features".
IMPORTANT
YOU MUST USE THE REMOTE CONTROL INCLUDED WITH THIS TV. YOU CANNOT US A REMOTE CONTROL FROM ANOTHER MITSUBISHI COMPONENT AND YOU CANNOT USE "UNIVERSAL" REMOTES FROM OTHER MANUFACTURERS.
IF YOU LOST YOUR REMOTE. PLEASE PURCHASE THE SAME MODEL AND NOT EQUIVALENT MODEL.
please leave me comment, if you need further assistance RNJ VINODKUMAR
The lamp is not enabled possibly due to the colour wheel motor not turning.
Any broken glass jamming it?
Or the lamp ballast has failed due to an old/worn lamp.
Your Mitsubishi VCR HS-U580 looks to have a problem with the information rollers and drum. Here are some things to check:
Look for something blocking the VCR or cassette compartment that would possibly be stopping the guide rollers.
Check the belt that drives the VCR mechanism. If it is loose or broken, you may also need to substitute it.
Clean the video heads using a head-cleaning cassette to make certain they're not dirty.
See if the drum motor is working. If it is not spinning, there may be an issue with the motor.
If the trouble persists, it's an exact idea to get assistance from a professional technician or contact Mitsubishi's purchaser support for advice.
Be cautious when dealing with electronic devices, and if you are not certain what to do, it's great to get assistance from an expert.
i think finding a downloadable service manual for your Mitsubishi HS-U580 VCR might take some searching, but here are a few options:
Check the official Mitsubishi website's support section. They might offer downloadable manuals for older models.Many online appliance parts stores like RepairClinic or AppliancePartsPros stock service manuals for various brands and models. Search for your specific VCR model to see if they have it available.Websites like ManualsLib or iFixit sometimes host user-uploaded service manuals. While the availability and quality can vary, it's worth checking. If online options fail, consider purchasing a physical copy of the service manual from online marketplaces like eBay or Amazon.
Remember, some websites might charge a fee for downloading manuals. Always be cautious of suspicious websites and download from reputable sources.
You can purchase a replacement power cord for your Mitsubishi model #LT-55164 from TVserviceParts.com. The part number for the power cord is 246C638010 and it costs $18.40.
Hoping you did not have electric overload that damaged the power supply, try unplugging the set and push the button On until no lights indicate anything. Then wait about an hour so the capacitors would empty themselves further. Next plug it back in and see if this worked. It is never wrong to push the edges a little in finding if the cables that go around the screen have a problem at that point. When one opens the TV (off power and unplugged) these flat cables should be checked for corrosion and right position in connectors. Corrosion is caused by little moist only, combined with the electricity. Then see if capacitors from the power supply, or any at all, have expanded tops. Those are the larger and smaller towers with metal on top that is divided in three parts. New ones alike can then be ordered but replacing requires basic skills. Further examples can be found on YouTube. Capacitors are common to fail early. Those larger ones have dangerous high voltage and can hold their charge for long span of time. it is not uncommon for devices like this to fail after being off.
If your Mitsubishi TV LT-55154 has no picture but has sound and the green light is solid, there are a few potential causes for this issue:
Faulty backlight: The backlight in your TV is responsible for illuminating the screen. If the backlight is not functioning properly, it can result in a black screen while still producing sound. You can try shining a flashlight on the screen at different angles to check if you can see any faint images. If you can, it indicates a backlight issue. In such cases, the backlight unit may need to be replaced. Contact a professional technician or the manufacturer's support for further assistance.
Loose or damaged cables: Check that all the cables connecting your TV to external devices (such as cable/satellite boxes, DVD players, or gaming consoles) are securely plugged in. Ensure that there are no loose connections or damaged cables, as this can lead to a loss of video signal.
Incorrect input/source selection: Make sure that the TV is set to the correct input or source that corresponds to the device you want to watch. Use the TV remote to cycle through the available input options and see if the picture appears on any of them.
Display settings: It's possible that the display settings on your TV have been inadvertently adjusted or misconfigured. Check the TV's menu options for any settings related to picture or display, such as brightness, contrast, or picture mode. Resetting these settings to their default values might help resolve the issue.
Hardware malfunction: In some cases, a hardware malfunction within the TV, such as a faulty video processing unit or mainboard, can cause a loss of picture. In such situations, it's recommended to contact a professional technician or the manufacturer's support for further troubleshooting and potential repairs.
Remember to exercise caution when working with electronics, and if you are unsure about any steps or lack the technical expertise, it's best to seek professional assistance to avoid causing further damage to your TV.
If your Mitsubishi WD-77731 TV screen has turned completely white with white vertical lines, it is possible that there may be a fault in the display panel or the video processing circuitry of the TV. This could be caused by a variety of issues, including a faulty LCD driver board, a loose or damaged video cable, or a problem with the TV's power supply.
Here are some troubleshooting steps you can try to determine the cause of the problem:
Check the video input: Ensure that the video input to the TV is working properly by connecting a different video source, such as a DVD player or game console, to the TV.
Check the video cables: Inspect the video cables that connect your video source to the TV for any damage or loose connections. If you find any damage, replace the cable.
Power cycle the TV: Turn off the TV and unplug it from the power outlet for 1-2 minutes. Then, plug the TV back in and turn it on to see if the issue persists.
Check for firmware updates: Check the Mitsubishi website to see if there are any available firmware updates for your TV. Updating the firmware may help to resolve any software-related issues.
If none of these steps resolve the issue, it is recommended that you contact a professional TV repair service to diagnose and fix the problem.
