I cannot reset my boot screen logo - Dell OptiPlex SX280 PC Desktop

try to set it back to factory.
press and hold the "Volume Up", "Home", and "Power" buttons.
Release the buttons when you see the recovery screen and the Samsung logo.
Use the volume buttons to navigate the menu and select "wipe data / factory reset". ...
On the next screen, press "Volume Up" to continue.

From tomshardware site,,,

You just switch off the power while the "Checking NVRAM" is
dispalyed and the next time you boot, the BIOS is reset.

The easiest way to test it, is to first disable the "Full screen
logo" in
"Boot settings configuration" and then do the test. If the BIOS is
reset,
the Full screen logo is displayed at boot time.

see if that works

You need to do a factory reset by holding down the power and the volume (-) down button at the same time until u see a black screen with Command prompts.. After this use the volume up and down buttons to stroll up and down and the power button to select.. Go down to data factory reset and press select then select yes.. And your tablet should reset itself.. This May or may not work on the first try.. Please wait at lease 5 minutes for it to boot up because it will take a while to boot after this so don't get all frustrated. If it's still stuck at the go logo just go back to step 1 and repeat.. This is what I did for my tmax 9 tablet when it was stuck at the go logo.. It didn't work the first ten for me but for the 2nd factory wipe it did the trick..

try reset CMOS.or re-wiring the electrical wires,make sure they are seated tight.

There are 2 things you could do. 1) you can change the boot settings in the bios or 2) you can choose the the boot device on the logo screen or bios screen on startup. to do #1 you need to press either DEL or F2 on the logo/bios screen. inside you can change the boot priority. for #2 once you see the logo/bios screen you can either press F10, F11 or F2 to go to the boot device selection. To know which buttons to press for these once you are on the bios screen the right button will be flashed.

Sounds like a corrupt operating system you can try the master reset steps below WARNING ALL PERSONAL DATA WILL BE LOST UNLESS STORE ON THE SD CARD

Other wise contact your provider via website or phone for the closest repair center

http://locator.t-mobile.com/Locator.aspx

1. Back up all necessary data.
2. Turn off the phone.
3. Press and hold the Volume Down and Power keys.
4. Wait 3 seconds and press the Back and Menu keys.

5. Note: If you see the LG logo before pressing the Back and Menu keys, the reset hasnt been completed and you will need to restart.
   

6. Release the Power/Lock key after you see the LG logo.
7. Release the remaining keys after the LG logo flashes (blinks once).
8. The Android Unpacking screen appears.
9. The phone will restart and complete the factory reset.

If you are getting the logo in the beginning that means screen is fine. Reset defaults for BIOS and try booting your computer with the help of disk.

Try a hard reset.

1. Press the home button (the big circle below the screen) and the sleep wake button (the button on top of the iPhone) simultaneously.
2. Hold both buttons simultaneously for a few seconds, Ignore the "Slide to power off" and keep holding
3. The iPhone should now shutdown automatically - (fade to black)
4. Turn the iPhone back on by hitting the sleep/wake button.
5. You should now see the Apple logo, your iPhone is restarting and thus booting up.
6. You have completed a hard reset successfully.

Plug it and recharge it via the wall adapter. It may not have enough charge to boot up enough to mount.

Try resetting the BIOS.
To access the BIOS press the F2 key at VAIO logo.

Then, on the BIOS Setup screen, press the F9 key followed by the Enter key to reset the BIOS to default values and then press the F10 key to Save and Exit from the BIOS screen.