Pc Tower clock display out of sinc with desktop clock

no pc stated must TOWER.
I have tower severs, huge, and desktops and more.
tower means zero.
USB flash stick (thumb drive, etc)

no PC stated, all HP PC have service tag
tell the full model name , wins 10x better answers. for sure.

here is your tag , on one of min is top front , other left side. case.
clear as day... HP bla bla
http://pcdied.com/

go to run
type cmd
type chkdsk in black window
it will show if your hard drive is having problem.
it will also show you how to fix the problem it is doesn't work try replacing your ram and then motherboard.

have the internal power supply examined for bad caps or missing voltages.

We need to follow some Troubleshooting steps

power off the tower
disconnect the power cable
1.open the side panal of the tower
2.then open the front panal of the tower
3.the please toggle the power button from inside the tower
4.then put back the front and the side panal
connect back the power cable
restart the pc using the power button
it will start working

please open the tower of the computer from the side and clean the RAM of the computer using a soft cloth and make sure no dust is present .Put the stick in the same way back and close the tower .
The problem should be resolved

check on the back of the pc tower where the power cable plugs in, there may be a small switch that needs turned on again, failing that i would open the tower and trace the wires back to the mainboard one may have come loose

Yes it is, however, the Vostro 200ST and MT series are the same board its a 10cent battery, they sell them at a camera store

try middle (green) plug in back of tower.

the problem is your power button needs to be replaced or you can buy a new pc box on ebay for cheap.

Look in the back of the Gateway where you currently have the video cable connected. If there are two connectors, (Side by Side) there than disconnect & re-connect to the other. Your display should come up. Don't be fooled. Most Pc's that have no display on their monitor is not a monitor problem but a computer problem.