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Use the (-) key to the right of the decimal point key when entering a negative number. The - key to the right of the 6 key is for subtracting something from something else. In order to subtract from something, if you don't specify anything then the calculator uses the previous answer as designated by "Ans." The same thing happens with the + key for example, because it adds something to something else.
This appears to be something software related, possibly to do with the BIOS.Id suggest taking it to a computer trained person. By the way though,a similar thing occurred with me and my laptop(It didn't start up correctly) and i though it was broken for good.However,it miraciously started working after a few days? Weird.
Are you trying to reinstall your OS? Or just trying to boot to normal mode?
If the first is your case, you have to choose booting with CD drive in order for your system to boot on your CD Installer.
However, if the second is your case, you don't need to press F2 and F12 after powering on. If you encounter this without your BIOS changed, try reverting it back to BOOT on HARD DRIVE. That is when you are in the BOOT OPTIONS, select HARD DRIVE and press ENTER.
How Do I Change the Primary Master HDD User Password?
Prior to loading an operating system, your computer will first execute the BIOS program. The BIOS has an extra password feature, called the hard disk drive (HDD) user password, that can't be bypassed and provides a layer of defense to keep your data secure. To change an existing HDD user password you will have to load the BIOS menu, which is only accessible during the computer's operating system reboot procedure.
1. Close any windows that are currently open on your computer. Eject any discs inserted into the optical drive and disconnect any peripheral USB devices.
2. Open the "Start" menu and select "Shut Down." Turn on your computer once the operating system finishes shutting down.
3. Press the key your computer uses to load the BIOS menu. For example, with Dell computers tap "F2" when the "Press F2 for Setup" option appears. Press the "Access IBM" key on IBM laptops or "F10" on HP desktops.
4. Navigate to the BIOS tab that contains the HDD password option, which will usually be the "Security" tab. Some computer manufactures instead include the password option in the "Advanced" tab.
5. Scroll down to the option labeled either "User Password" or "BIOS lock" and hit "Enter." Type the current master HDD user password when the prompt appears and press "Enter."
6. Input a new HDD user password and hit "Enter" again. Navigate to the BIOS tab labeled "Exit" or something similar.
7. Move over to the "Save and Exit" entry and press "Enter." Select "Yes" and tap "Enter."
The GeForce4 Ti has two rear ports. 1 HDMI and 1 VGA. Try plugging into each. Video signal should be sending out of one of the ports. If neither port is sending out signal than you'll need to trick the bios. Suggest you remove the Gforce4 Ti AGP card from the MB so you can regain video display and change the settings within the bios. Once you have display, enter the bios menu. Do you have your manual? Enter bios menu by pressing the "Delete" key every 2 seconds until the bios menu loads. Open, Integrated Peripherals, see top of page 3-11. Set Primary Graphic's Adapter to: [AGP]. Than go to the top of page 3-10. Change the AGP Aperture Size to as low as possible or to: [Disabled] "preferred". AGP 8x Support set to: [Enabled]. Save your settings and exit the bios. The system will restart. Press and hold the power on / off button until your system shuts off. Install your GeForce4 Ti AGP video card. Double check your video card! Some NVIDIA cards need external power above what the AGP slot can provides. Some use a power connector like the floppy drive uses. Other look just like a hard disk drive power connector: 4-pin Molex. If none is found don’t worry about it.
open ur pc cover and there r a cmos jumper on the near of the battery (cell). here 1 more pin on this jumper. remove the jumper and change the pin . than on ur pc for 10 - 20 sec and than off ur pc. and replace the jumper on his real place,,,,,,,
You should be able to change this setting in the PC bios menu. Windows XP should interact with this and change it automatically, but it occasionally doesn't.
If you have trouble finding the appropriate menu and changing it, please post back with details of your PC (ideally motherboard make and model) and we can hopefully talk you through it.
When the computer starts up, there should be a screen before the windows XP screen which says something like "press f8 to enter BIOS setup", but all machines are a little different. If you can get into the BIOS setup, only change things which you are sure you know what they will do, or you can cause all sorts of problems.
Hope this helps, post back with system details if you need more :)
There maybe electrical shorts connecting the two motherboards, logic part and screen display part, or within the screen display part, causing the weird display when the calculator appears otherwise functional.
Open the TI 83+ case following the U Of Washington posting on fixing TI 83+ problem on inability to communicate with TI link cable between calculator and computer. I used the plastic tools in an IPod battery replacement set to open the TI 83+ case as plastic tools will cause less damage to the TI case.
Under the aluminun foil are the two motherboards, each a work of beauty. Good work TI. Connecting the two motherboards is a adhesive enbedded connectors sheet. Above that adhesive connector sheet was a different adhesive connectors sheet in the screen display part, which in my case, some of connectors were exposed. I wiped that adhesive connector sheet and the weird display disappeared with calculator functioning. I may buy some heat resistant clear adhesive tape to put over the exposed connectors part for insulation if problem occurs again.
The above may or may not be helpful.