I have a staples SPL-290X calculator. There is a "GT" message in the top left corner, and the calculator appears locked - I can't type any numbers. Need to understand what this is, and how to fix.

SOURCE: Blue ghost image on the top left hand corner of my Hitachi 50V500A.

You have a defective light engine and you do not have to be under warranty for Hitachi to replace this part. We just went through this and here's what you need to do. Call Hitachi's customer relations department at 800-654-7013 and tell them that you have a defective light engine. They will act like they've never heard of this problem but they have. They will give you the names of some certified dealers in your area to call. Once a tech comes out and confirms that it's the light engine, call Hitachi back and they will send a brand new light engine to the dealer and Hitachi will cover the cost of the part (cost $1500).

Here is the deal, if you're under warranty, Hitachi will cover the part and the install. If you're not under warranty, all you pay is the install. Our install cost $400. Others on this site have paid $200. Do not let anyone tell you that you have to pay for the light engine part...you do not. Hitachi has not recalled this part but they are replacing it for free. Also, deal only with Hitachi customer realations number that I listed. Good Luck!

SOURCE: Audiosonic TV - Word "Factory" appears on top left corner

Try pressing the RETURN button (above the DISP button - number 6 on the button list in the manual). The button has two arrows chasing each other. It worked for me on our Audiosonic KMC TH68 TV.

SOURCE: cant get M2 off of my TI-30XA calculator

Remove the six screws on the back cover. After the batteries are installed you need to reset the board. There is a little reset area that needs to be shorted to get the calculator back to normal. Look closely at the circuit board- You'll see a little circle next to the word reset. Its near the middle of the board. Wet your finger- press it on the circle. It should short. Blow it dry with your breath. It should work...

SOURCE: change decimal placement on calculator

pressing the tab button displays the number of decimal places 0, 2, 3, 4, A, F on the bottom of the screen.

SOURCE: I'm using a Staples scientific calculator BD-6108

What is BIN at the top of the screen? How do you get rid of it?