Lost Ant1 & Ant2, other inputs (HD1, HD2, Video 1, 2, & 3) OK

If can speak English I can help as my Spanish is limited---the convergence of green cannot be adjusted except in technical menu and if bad needs both the stk-392-110 chips replaced first.

The model indicated is a older Toshiba rear projection(if another brand/model let me know)

You should be able to select the rear inputs either via the remote (original one) or with the input (video) button on the set.

If in the menu they are grayed out--it means they have been locked out.

Failing that a serious problem exists in the set's microprocessor.

Hint: if you have not tried it UNPLUG THE SET FOR A WHILE TO SEE IF WHEN YOU PLUG IT BACK IT WILL RESET and restore the inputs.

Hi Tod,

If colors do not align correctly, most likely you have a convergence failure. This requires replacement of the 2 STK ICs and possibly some low ohm resistors.

Some Toshiba have a Horizontal oscillator/Drive IC failure that results in a small or shrunk picture (2-3" border on all sides). The 3 colors do not align properly because of the reduced Hor drive signal. The convergence adjust controls will work but not allow good adjustment. Convergence is ok, Hor Drive signal is incorrect.

Many do-it-yourselfers mistake the Hor Drive problem in Toshiba RPTV with convergence failure. Too much adjustment of the convergence controls may cause the saved data to be really messed up and require more difficult alignment in the service mode.

If minor or simple adjustments in the customer convergence adjust menu do not fix your problem, there is a fault. Stop adjusting until fault is repaired

Convergence failure can be accurately identified with the Convergence Gallery on our website. Service in Toronto, Ottawa, Calgary, Edmonton and other Canada cities.

easyab

According to the user's manual on page 16, press Menu and open the Setup menu. Highlight Installation and press Enter. Open the Terrestrial menu and highlight Input Configuration. Select the ANT1 or ANT2 (whichever the antenna is connected to) and select input source Antenna [not cable]. Highlight Done and press enter. Now rescan your channels. If you still get nothing, try relocating your antenna to a better place. Digital TV is highly dependent on line of site signals. So if you are in a mountainous region or surrounded by a lot of high rise buildings, you may not receive a good enough signal to register channels on your TV.

Try adjusting the convergence. If it won't move see below- (or hitting Magic Focus for some Hitachi’s)

This sounds like convergence output IC problem. convergence board would have to be removed - remove and replace 2 STK IC's and check the surrounding resistors. Shops usually charge between $200-$400

I would look to see if a set up menu on the set has the other inputs lock out.

I made the same repair in a Toshiba 42h81 I replaced the STK 392-110 and after a lot of searching found the cheaper ones last 6 month or so be sure to use Sanyo IC's and replace the resistors with them when the IC's let go they take the resistors out I posted my repair On my page if it will help you dennisgm052.weebly.com

You brought up an issue that we hadn't considered. Shortly after hooking up our TV to the receiver with a composite video, our convergence which wacko. My hubby replaced the 2 ICs, but now our power button just flashes red, with no picture. Not sure if new ICs are faulty or if it's another issue. He will replace old ICs to see if problem still exists with turning on the tube. And he'll try disconnecting the video signal to see if problem exists.

Ouch.. may have to consider another tv thanks to new technology ??????

Good luck solving your problem.

you need to replace the 2 stk-110's mounted to the heat sink
i had the same problem
and works pretty good now

Elsewhere! Bad hyper board =bad caps on board need replacement = find a different tech who has heard of this repair or
have him research fixya / Toshiba/ 42H81 / hyper board ......T.