The screen was a little dark, despite the brite and contrast being all the way up. The OSD had no problem but any other input did. I turned the screen up enough on the flyback to see the retrace lines and turned it down till I could not see them anymore. This sent unit into overload protection mode and shut unit down. I am currently waiting the 4 hours for the hard reset to occur since I cannot see anything. Unit dooes not show any of the 9 service codes on the Timer LED when started or turned off. Could this be a bad flyback or the B board problem?
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Please try reducing the contrast a little and increasing the brightness till the dark shots are clear. Please also check the back light setting. It should not be too low.This should make all the dark scenes clearly visible if it only a setting problem. In case the overall brightness has reduced, please consult a local TV Tech.
Make sure batteries are good and inserted correctly, respecting the polarity diagram: Yes, I myself made this mistake and it must be ruled out before doing anything else.
After a change of batteries, the screen contrast can change: It may become too dark or too light. If it is too dark, you would not think about a malfunction because you see something on the scree. BUT it the screen is too light, it is easy to conclude that there is a malfunction because you do not see what the calculator is doing after you press a key.
So, the second measure is to adjust the contrast. Press [2nd] key and Release it. Then Press and HOLD the UpArrow until screen is dark enough.
A third easy measure is to use the TIConnect software (available on education.ti.com) to retrieve the device Info, and if calculator is recognized to reinstall or update the OS. You need a TI USB SilverLink cable.
Here are some more procedures to perform in the order they are presented. Please read the post till the end.
Remove one of the AAA batteries.
Press and hold the [CLEAR] key.
While holding [CLEAR], reinsert the AAA battery and then
turn the calculator on.
the calculator should display the message "RAM Cleared".
Release the [CLEAR] key and then press it one more time to remove the message "RAM Cleared".
Remove batteries including the backup battery for 5minutes.
After the 5 minute period, reinsert all of the batteries and
Sounds like your contrast is a little too dark. Press the 2nd key and then hold down. This should dim the contrast. If you dim it too much simply daeken it by pressing second and up.
If this helps please dont forget to vote. Thanks
This is called a dark shading error. All the LCD consumer sets have some visible degree of this effect. Some will be a little less or more than others even from the same batch in the assembly run. This has to do with the optical design quality of how the back-plane lamps illuminate the screen. The design and assembly tollerance of this area is very critical.
Normally, LCD screens don't show their best picture in a darkened room. The very black regions of the picture content may look a little washed out. LCD screens are best watched in a room that is lit, but not very bright. You have to consider that there is a powerful set of lights behind the polarized panel of the LCD display, and there will always be some breakthrough of light.
If you want a TV that is more like a CRT in its characteristics a Plasma would have been a good choice. The trade-off with the Plasma is that it does not have the picture sharpness of the LCD. A Plasma set is best watched in a darkened room.
If you have an LCD computer monitor, take a look at it in a dark room with a black screen. You will most likely see the dark shading errors. Only the very expensive production studio type LCD monitors have less of this error than the consumer sets, and they are not absolutely perfect.
Flyback transformers usually have 2 adjustable rods - 1 is for focus the other is for screen (G2) voltage. try turning Clockwise the Screen adjust with brightness-contrast at max. Till you see white diagonal lines, then go back until the lines disappear - then tune the brightness to your desired level.