Dell power edge 2850 make 4 seconds beeps alarm without stopping and without show any error Msg on the screen.

Oven keeps beeping:
As there is no reprogramming of most control boards try this, disconnect the power and wait 30 seconds and then reconnecting the power.

If it's an "F1" fault code this generally implies an electronic oven control (EOC) failure. Disconnect the power, wait 30 seconds or longer and then reapply power. If "F1" returns upon power-up, replace the electronic oven control.
The oven control can be accessed and replaced from the rear of the control panel.

NOTE:Disconnect the power cord from the power source before removing the panel from behind the console.
If its an F2 ERROR CODE, The F2 error indicates an open circuit in the oven temperature probe.

Your range has a resettable thermostat in series with the oven temperature probe. If this thermostat opens the clock will display F2 and the oven won't heat.
You can reset the thermostat by pushing in the reset button on top of the thermostat.
Some ovens have an alarm that will beep continuously every six seconds to alert you that the oven is still on. Usually, a kitchen timer that you have set will cause the beeping, but occasionally it can be an error with the oven's settings. If it is the kitchen timer, you can simply push the "Kitchen Timer On/Off" button to end the continuous beeping. If that does not stop the beeping, it is probably beeping due to an error. You can turn the continuous beeping off but you may still need to troubleshoot the issue that is causing the beeping noise.

Read more :

http://www.ehow.com/how_12086370_ge-oven-stop-beeping.html

Oven keeps beeping:
As there is no reprogramming of most control boards try this, disconnect the power and wait 30 seconds and then reconnecting the power.

If it's an "F1" fault code this generally implies an electronic oven control (EOC) failure. Disconnect the power, wait 30 seconds or longer and then reapply power. If "F1" returns upon power-up, replace the electronic oven control.
The oven control can be accessed and replaced from the rear of the control panel.

NOTE:Disconnect the power cord from the power source before removing the panel from behind the console.
If its an F2 ERROR CODE, The F2 error indicates an open circuit in the oven temperature probe.

Your range has a resettable thermostat in series with the oven temperature probe. If this thermostat opens the clock will display F2 and the oven won't heat.
You can reset the thermostat by pushing in the reset button on top of the thermostat.
Some ovens have an alarm that will beep continuously every six seconds to alert you that the oven is still on. Usually, a kitchen timer that you have set will cause the beeping, but occasionally it can be an error with the oven's settings. If it is the kitchen timer, you can simply push the "Kitchen Timer On/Off" button to end the continuous beeping. If that does not stop the beeping, it is probably beeping due to an error. You can turn the continuous beeping off but you may still need to troubleshoot the issue that is causing the beeping noise.

Read more :http://www.ehow.com/how_12086370_ge-oven-stop-beeping.html How to Get GE Oven to Stop Beeping eHow

The Beep codes indicate an error. Look here to diagnose further.

2000-0142 and 2000-0146 are hard drive SMART errors, indicating the HDD will fail.
To boot message about the AC adapter was a BIOS level message that normally appears when a Auto/air ac adapter or other 65 watt ac adapter is used to power the system.

Usually there are manual configurations in the BIOS that need to be configured to accept the second processor.

It might not be a driver. It might be the monitor. Try another monitor.

Turn off the PS3. Press the power on button (the system will beep) and hold it down for approximately 5 seconds until you hear a second beep. This will reset the video to the default. You should get a low resolution screen and be able to log on and reset the display to the desired settings.

turn the machine to PRG - unplug for 20 seconds. while pressing clr plug back in

have a jvcgr-smx750 . It was working fine but recently I powered it up with battery, without battery and just ac power cable. Both times it does power up and shows the screen for about 2 seconds, beeps, and then shuts off. Please help

that may be because of a bad connection with the harddrive thats easy to fix you just take the harddrive out and blow the connecting surface clean then it should behave normaly agian:)