I have a toshiba 42hp66 flat screen plasma. my problem is sometimes when i first turn it on i get a test screen effect on my hdmi 1 input. i have to change the video input and shut the tv off then turn it on again and change the input to hdmi to get the picture. i only have 2 hdmi inputs and the other is used by my dvd player

Dear Sir/Madam,

Although these effects are temporary but they can cause screen burn-in problems later. The Toshiba 42HP66 comes with default picture settings, which is basically the Sports mode. The sports mode reproduces vivid mode effects. If you switch the picture mode to standard then it will decrease the contrast and brightness. According to a C-NET test, it has been found that the 42HP66 does not reproduce the same black level quality like some of the first-tier plasma televisions. Another drawback is the inconsistency in the color especially in light and dark scenes. There is also a considerable video noise in the picture.
The Toshiba 42HP66 has been enhanced with a colorimeter to ensure the delivery of best picture quality. It also has a Sencore High-Definition signal generator, as well as a specialized software suite that can calibrate the television to the Imaging Science Foundation (ISF) standard color temperature of D6500K. Overall, the 42HP66 ives quite a performance...

Thanks
Good Luck

Toshiba's CrystalScan HDSC technology upconverts all video signals (including 480i/p) to 1080iHD, resulting in a significant reduction in jagged line artifacts to create the sharpest, most realistic picture possible from every source.

Unplug the wires for sometime then replug it again and then check out.also readjust the menu settings again afterr you turn it on.

Try swapping the 2 hadmi inputs, this is probably a compatibility issue with one of the two devices connected through HDMI.