Table 10-1Numeric Codes and Text Messages (continued)

Control panel message

Description

Recommended action

 

 

 

The machine cover has been removed since

Computer cover was removed since last

On some models no action is required. On

last system startup. Please ensure that any

system startup.

other models you must clear the warning

system access was authorized. Press <F2> to

 

message in the Computer Setup utility. To do

continue.

 

so, restart the computer and press F10

 

 

before the computer boots to the operating

 

 

system to enter the Computer Setup utility. In

 

 

the PC Health menu, open the Chassis

 

 

Opened Warning item and select Clear.

 

 

Save your changes and exit the Computer

 

 

Setup utility.

 

 

 

Hard disk failure is imminent. Please back up

Hard drive is about to fail.

Back up data on the hard drive and replace

your hard disk and have it replaced! Press

 

the drive.

<F10> for Setup, <F2> to continue.

 

 

 

 

 

Warning: Changing setup options while

Warning message.

No recommended action.

resuming from Hibernate may cause your

 

 

system to fail to resume.

 

 

 

 

 

Interpreting POST Diagnostic Audible Codes

This section covers the audible codes that may occur before or during POST that do not necessarily have a text message associated with them.

WARNING! When the computer is plugged into an AC power source, voltage is always applied to the system board. To reduce the risk of personal injury from electrical shock and/or hot surfaces, be sure to disconnect the power cord from the wall outlet and allow the internal system components to cool before touching.

NOTE: Recommended actions in the following table are listed in the order in which they should be performed.

Not all audible codes are available on all models.

Table 10-2Diagnostic Audible Codes

Beep Definition

Possible Cause

Recommended Action

 

 

 

1 short beep and 1 long beep

Bad memory or memory

CAUTION: To avoid damage to the DIMMs or the

followed by long pause

configuration error.

system board, you must unplug the computer

 

 

power cord before attempting to reseat, install, or

 

 

remove a DIMM module.

 

 

1.

Reseat DIMMs.

 

 

2.

Ensure that the DIMMs are installed in the

 

 

 

correct memory sockets.

 

 

3.

Replace DIMMs one at a time to isolate the

 

 

 

faulty module.

 

 

4.

Replace third-party memory with HP memory.

 

 

5.

Replace the system board.

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HP 600B manual Interpreting Post Diagnostic Audible Codes, 2Diagnostic Audible Codes, Opened Warning item and select Clear

600B specifications

The HP 600B is a versatile desktop computer designed to meet the demands of both business users and professionals. Recognized for its compact design and robust performance, the HP 600B is particularly suited for a range of applications, from basic office tasks to more complex business processes.

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