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Optiplex 755 freezes during start-up with numbers 3 and 4 lit
All,
I have some issues with my Optiplex. First it doesn't always react when the power button is pressed.
And now it doesn't start up. In the start-up process the computer freezes, even before the start-up screen is visible, and the numbers 3 and 4 are lit on the display.
Any suggestions how to solve these problems.
Thx,
Gert-Jan.
speedstep
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47K Posts
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December 13th, 2010 07:00
OptiPlex 755 - Documentation
Troubleshooting
Memory modules are detected, but a memory failure has occurred.
System Lights
Your power button light and hard drive light may indicate a computer problem.
Power Light
Problem Description
Suggested Resolution
Solid green
Power is on, and the computer is operating normally. On the desktop computer, a solid green light indicates a network connection.
No corrective action is required.
Blinking green
The computer is in a power-saving mode.
Press the power button, move the mouse, or press a key on the keyboard to wake the computer.
Blinks green several times and then turns off
A configuration error exists.
Check the diagnostic lights to see if the specific problem is identified (see Diagnostic Lights).
Solid yellow
The Dell Diagnostics is running a test, or a device on the system board may be faulty or incorrectly installed.
If the Dell Diagnostics is running, allow the testing to complete.
If the computer does not boot, contact Dell for technical assistance (see Contacting Dell).
Blinking yellow
A power supply or system board failure has occurred.
See Power Problems.
Solid green and a beep code during POST
A problem was detected while the BIOS was executing.
See Beep Codes <ADMIN NOTE: Broken link has been removed from this post by Dell> for instructions on diagnosing the beep code. Also, check the diagnostic lights to see if the specific problem is identified (see Diagnostic Lights).
Solid green power light and no beep code and no video during POST
The monitor or the graphics card may be faulty or incorrectly installed.
Check the diagnostic lights to see if the specific problem is identified (see Diagnostic Lights).
See Video and Monitor Problems. <ADMIN NOTE: Broken link has been removed from this post by Dell>
Solid green power light and no beep code but the computer locks up during POST
An integrated system board device may be faulty.
Check the diagnostic lights to see if the specific problem is identified (see Diagnostic Lights). If the problem is not identified, contact Dell for technical assistance (see Contacting Dell).
Diagnostic Lights
To help troubleshoot a problem, your computer has four lights labeled 1, 2, 3, and 4 on the front panel. When the computer starts normally, the lights flash before turning off. If the computer malfunctions, the sequence of the lights help to identify the problem.
Light Pattern
Problem Description
Suggested Resolution
The computer is in a normal off condition or a possible pre-BIOS failure has occurred.
The diagnostic lights are not lit after the computer successfully boots to the operating system.
A possible processor failure has occurred.
Memory modules are detected, but a memory failure has occurred.
A possible graphics card failure has occurred.
A possible floppy drive or hard drive failure has occurred.
Reseat all power and data cables.
A possible USB failure has occurred.
Reinstall all USB devices and check all cable connections.
No memory modules are detected.
Memory modules are detected, but a memory configuration or compatibility error has occurred.
A possible expansion card failure has occurred.
Another failure has occurred.
) to ensure the boot sequence is correct for the devices installed on your computer.
Beep Codes
Your computer might emit a series of beeps during start-up if the monitor cannot display errors or problems. This series of beeps, called a beep code, identifies a problem. For example, beep code 1-3-1 (one possible beep code) consists of one beep, a burst of three beeps, and then one beep. This beep code tells you that the computer encountered a memory problem.
Reseating the memory modules may correct the following beep code errors. If the problem persists, contact Dell (see Contacting Dell) for instructions on obtaining technical assistance.
Code
Cause
1-3-1 through 2-4-4
Memory not being properly identified or used
4-3-1
Memory failure above address 0FFFFh
If you experience any of the following beep code errors, see Contacting Dell for instructions on obtaining technical assistance.
Code
Cause
1-1-2
Microprocessor register failure
1-1-3
NVRAM read/write failure
1-1-4
ROM BIOS checksum failure
1-2-1
Programmable interval timer failure
1-2-2
DMA initialization failure
1-2-3
DMA page register read/write failure
1-3
Video Memory Test failure
1-3-1 through 2-4-4
Memory not being properly identified or used
3-1-1
Slave DMA register failure
3-1-2
Master DMA register failure
3-1-3
Master interrupt mask register failure
3-1-4
Slave interrupt mask register failure
3-2-2
Interrupt vector loading failure
3-2-4
Keyboard Controller Test failure
3-3-1
NVRAM power loss
3-3-2
Invalid NVRAM configuration
3-3-4
Video Memory Test failure
3-4-1
Screen initialization failure
3-4-2
Screen retrace failure
3-4-3
Search for video ROM failure
4-2-1
No timer tick
4-2-2
Shutdown failure
4-2-3
Gate A20 failure
4-2-4
Unexpected interrupt in protected mode
4-3-1
Memory failure above address 0FFFFh
4-3-3
Timer-chip counter 2 failure
4-3-4
Time-of-day clock stopped
4-4-1
Serial or parallel port test failure
4-4-2
Failure to decompress code to shadowed memory
4-4-3
Math-coprocessor test failure
4-4-4
Cache test failure