20 Most Recent Toshiba TN50X81 50" Rear Projection Television Questions & Answers

Have audio with NO video is not a strange thing. It is only for you! Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis. http://electronicshelponline.blogspot.com/ To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

More likely is the set is in shutdown---most common issue on this type of set is the convergence---to know you would have to locate and unsolder both 18 pin convergence chips---with them out of the circuit if the set comes on (will not look good) one of the two chips is shorted--these sets have very good protection circuits to prevent many parts from being destroyed at one time..These are the chips--STK number is right on the front.

Your TV is going into shutdown mode. The most common cause is a problem in the convergence IC's. Both chips will have to be replaced and at a cost of around $350 for most shops. Thx

Bill W
integrityhomeworx.com

If your TV looks 3D, warped, or distorted it likely has a convergenge problem.
If however it just looks dull, washed out, redish, greenish, or blueish or if it looks like objects on the screen have halos the fluid in the lens has soured.
You can search google for parts or you can get the parts with repair instructions from sites such as www.TvRepairKits.com

i have seen before that model have pretty severe cracked solder connections on the power board. otherwise those types of tvs can have convergence failures that will keep the tv from turning on.

Make sure the source of input has been switched to "Antenna" within the input options within the onscreen menu

the bulbs go out it is normal on projection tv's, you can order the new one online, just out in the model number of your tv and you will find it, be very carful not to touch the bulbs when they come or when you are putting them in the tv

convergence ics need replaced suggest going to local tv repair guy and getting it fixed pretty cheap

Usally access from rear panel, unplug and only wipe the lens with feather duster. do not mechanically move the projection tubes or you will effect the convergence of the 3 colors

This could be almost anything. I have a tip at http://www.fixya.com/support/r4916941-diagnose_repair_projection_tv_high which explains the process for finding the problem, walking a non technical person through it and listing places to get parts at a good price. If this tip does not solve the problem it has a link to another tip which explores more problems your set could have. Good luck. Let me know if you need more help.

Thanks for using FixYa and for the generous rating.

hardrocko

You likely have shorted soldering. If you bought a kit from someone go back to their site and ask for help.

Here are instructions on how to get into the TECH menu to adjust convergence--Understand if once you get there and red or blue are skewed and will not adjust--the convergence chips this set uses are bad.

Just look to see if it will or will not adjust.

If this information helped you rate this solution as I do this here for free.

SD TECH
Normal 0 false false false MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} Toshiba entry to adjust


With the set on press MUTE on the remote.

Then press and HOLD mute for several seconds and while still holding it on the remote press Menu on the front of the set.

A (S) should appear in the upper right corner of the screen. (It means you are in the Service mode)

Press menu again on the front of the set

7 on the remote will call up the convergence grid

3 on the remote will change the color to adjust from red to green to blue(do not adjust GREEN)


You navigate the grid with 2, 4, 6, and 8 buttons.

To stop the cursor from blinking so you can adjust at any point use the 5 button—to move again use the 5 button.


When you finish you exit by hitting 7 on the remote again.


Sometimes you have to try a few times to get into the menu—I have had my problems but once in it is easy.

I have the same problem, spiders actually are showing ip on the screen, did you get a solution on how to open the front panel? please help if you can.

This is a early HD set---what I call first generation--IT DOES NOT HAVE THE 16 X 9 FORMAT.

Many of the early HD sets are like this--4 x 3 or letter box type HD picture only.

Sorry to give you bad news but based on the model number it does not have 16 X 9 format.

If this helped you rate this solution as I do this here for free.

SD TECH

hi
A power regulator or a sweep power supply problem. The power regulators in the main power supply, and will have or start with STR###-## The # are numbers or letters. This is a repair that should be done by an amature or layman. This is a solid state set, and there are no user replaceable parts inside these sets. Have it looked at by a trained tech.
From your description, I suspect you have a power supply problem. It sounds like set is turning off because the power supply is not regulating properly. I would suspect you have a few Capacitors in the regulator circuit failing.
If you were to take this set into a shop for repair, I would expect the cost to be around $150.00 to fix it.
If you are going to look at it yourself. I would look for bad caps in the regulator section
If you are going to work on this yourself, I would recommend finding someone with television repair experience and the proper test equipment to help you. Television picture tubes contain, High voltage. You can be shocked even it the set is unplugged If the tube is not properly discharged.


hope u will b helpfull
regards

We had this problem too. If finally got to where it wouldnt turn on at all. A service man came out and replaced the power switch. That took care of the problem.

Replace the convergence IC's - P/N STK192-110 with part STK192-150 or 180. Then you can go back in and make the detailed convergence settings and get your picture back in alignement. Also check the flame-resistant resistors around the ICs to make sure that none of them have opened up.

What was the STKs that was in set ? If 110s always upgrade to STK392-180s. If they were 392-560s go back with the same. they worked differently then the 110s 150s 180s