Toshiba REGZA 42 in. Flat-Panel LCD HDTV - Page 8 - Answered Questions & Fixed issues

Hello,
you can do this yourself by opening the back cover of the television
CAUTION: To prevent damage to the CRT phosphors, immediately turn down the brightness so the line is just barely visible. If the user controls do not have enough range, you will have to locate and adjust the master brightness or screen/G2 pots.

A single horizontal line means that you have lost vertical deflection. High voltage is most likely fine since there is something on the screen.

This could be due to:

Dirty service switch contacts. There is often a small switch located inside on the main board or perhaps accessible from the back. This is used during setup to set the color background levels. (On some sets, this is located on the CRT neck board and may be a jumper plug or other means of selecting service mode - not an actual switch.)

When moved to the 'service' position, it kills vertical deflection and video to the CRT. If the switch somehow changed position or got dirty or corroded contacts, you will have this symptom. Flip the switch back and forth a couple of times. If there is some change, then replace, clean, resolder, or even bypass it as appropriate.

Bad connection to deflection yoke or other parts in vertical output circuit. Bad connections are common in TVs and monitors. Check around the pins of large components like transformers, power transistors and resistors, or connectors for hairline cracks in the solder. Reseat internal connectors. Check particularly around the connector to the deflection yoke on the CRT.

Bad vertical deflection IC or transistor. You will probably need the service manual for this and the following. However, if the vertical deflection is done with an IC, the ECG Semiconductor Master Substitution guide may have its pinout which may be enough to test it with a scope.

Other bad parts in vertical deflection circuit though there are not that many parts that would kill the deflection entirely.

Loss of power to vertical deflection circuits. Check for blown fusable resistors/fuses and bad connections.

Loss of vertical oscillator or vertical drive signals.

The most likely possibilities are in the deflection output stage or bad connections to the yoke.

make sure you are using component or hdmi cables, anything less will not be HD. also check your video output settings on the Xbox and make sure its set for 1080 or 720

If really the screen is damaged (not not just the covering glass), you most probably won't be able to get a new screen. Maybe buying some other TV of the same model... Otherwise only service can order the screen and replace it.. But screens are the most expensive part of LCD TV, so it probably won't be good option.
In any way, get the TV to the service for look and price estimation. Then decide if you want to repair it or buy a new model.

Sounds like a panel gone bad (LCD panel) Any warranty on it? Usually not repairable...cost more to repair than replace. Also possible it is the T-CON board...the board just before the panel. Get a tech to have a look at it. One is fixable, the other is not.

Your tv's power supply needs to removed and checked for bad caps and/or component solder joint breaks.

You can also look for refurb power supplies if you wish to forgo having the current board fixed.

I have purchased them online for computer lcd's. They are pricey for computers but for TV's they would be worth it since TV's are still up there in price.

Good luck and be careful!

I have the same problem. You need a new audio/video board.
Here is how mine sounds:
http://www.youtube.com/watch?v=yAXqWIhQYa4

go to menu put it on dtv scan channels/if not its aerial

if there r glass on screen then u sholud clean the screen by kirosin ( soil oil)

Go in ur tv menu go "Picture"go down to reset.Press it,will go back to Factory setting.The colors should be back to factory setting.Not,than ur tv Main Tuner signal board is the cause must change to fix.

Check the Fuse in the Plug

Unscrew the back of the TV and check the fuse inside

Use a Multimeter and check for voltage on the Switch Mode Power Supply.It's normally a plug just next to the fuse.

this feature its not from the TV is for DVR box, that storage the information on a hard drive inside, check your DVR model and number and google the proper manual for it

I had the same problem with a 32HL67. (Your TV may use many of the same parts.) The TV would not come on, and the only way to stop the yellow blinking light was to pull the power.

Took the TV to a local repair shop, and we jointly decided the problem was either the power supply or the main video board (seine board). We decided to try the video board first. Ordered board PEO249A, part number V28A000320A1 from www.discount-merchant.com (49.95 plus shipping) and had it installed last week. This solved the problem. However, a new problem showed up. The TV now will not scan over the air for digital stations. This is not really critical since I use DirecTV; however, it is good to be able to get the locals over the air.

When the video board was replaced, we discovered that the original board in my TV was PEO361A, part number V28A00043601. This is Toshiba part 75007222. (This board is also available at the same vendor for the same price.) This difference in parts may be the reason my TV now will not scan for digital stations. It appears that replacing the video board with either of these new boards will likely solve the blinking yellow light problem; however, if you use the PEO249A, you may lose the ability to scan for stations. On the other hand, there may be an inherent problem in the PEO361A which may be causing the blinking yellow light problem. Who can say?

The problem is with the signal board. Basically, it is not allowing the power signal to go from the on button from the set or the remote to the TV. I am having the exact same problem with my 42" LCD Regza. Currently, if you are under warranty, Toshiba does not have these in stock. They will not have them available to send until early January. My TV has been at the repair shop since December 4th. I am very upset as I won't be able to watch the bowl games in HD. If your set is still under warranty then call Toshiba help line at 800-575-5469. You will need the model number of yout TV that is listed on the front of the owner's manual. They are:
27HL67
32HL67
32HL67U
37HL67
42HL67

The first number will be the giveaway as to which model you have. It is the size of your set. They will ask you to try a hard reset. (Hold pwer button down for 5 seconds until you see the yellow light go solid and go off.) This will most likely not work. If it does, you are lucky. I found that if you unplug the TV for an extened period of time, ie overnight, ity may come back on. It will eventually give out completely though. Better to get the problem addressed with the manufacturer. If you are not under warranty then I do not know what to tell you. Right now I am searching the internet to see if I can find this part to maybe purchase myself. Only if it is not too costly. If I find anything I will post here for all. If you have any questions, feel free to email me a [email protected] and I might be able to give you more details on your problem. Good Luck.
WJ

probably your tv is developing a intermittent problem by cutting off when it develops heat.this is a hard problem.but to remedy it you can make checks in the power supply and resolder the regulator or go to the flyback area and resolder all the legs or the horizontal output.or resoldder the entire power supply component.if that does not solve your problem.it is time to take your set to a tech good luck.

I have the same exact problem. Any luck on getting this covered under warranty?

Go to Amazon.com or Ebay.com.Buy a cloth call Micro Fiber Colthes best to clean LCD Screen.The cloth very find wolfven fiber well not easy leave any scratches in ur LCD Screen.

I am having this same problem with our Mitsubishi LCD Flat Panel TV, Model LT-46246 ans our Scientific Atlanta remote cable box, same model as yours. We cannot use the remote at all to change the channel. I called Mitsubishi and they said they have never heard of this. I find this incredibly hard to believe. Time Warner, our cable provider says that it is not the box because it works when not hooked up to the TV. What a pain. I would love to hear if anyone else is having this problem or has a fix for it.

Press Zoom Button or Screen Size in your Remote Select Full Size for permanent Full Screen.

Go to menu on your remote control and select picture setting and try selecting "default" setting to seeif you like the color, if not adjust contrast to about two thirds of the way and brightness to your liking and color to about the middle.

3 Blinks indicates that there is fault with the power supply of the set. Since the set is brand new, run back to the store and get a replacement. Also purchase the extended warranty(Think of the 250$ that you are gonna spend on this repair if the same thing happens right after your 1 year warranty expires?)

Hope this helps,
Sai.