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HP Recommended
ProBook 6455b
Microsoft Windows 7 (64-bit)
My ProBook 6455b has recently started to act up on me.

If I let it boot without touching anything, it runs pretty much without issues and loads Windows perfectly, but sometimes, under hard load and long periods of use, it shuts down unexpectedly.

The issue gets worse when I try entering BIOS or running system tests on start-up, because it shuts down even faster whenever I press ESC on the HP logo and try to access the various system tools.

If the laptop is cold (as in the first boot of the day) it only lasts 2 ~ 3 minutes in BIOS or system tests, before it shuts down. If it's already warm from use, it won't last even 10 seconds. But, as I said before, if I let it boot to Windows, it loads fine, no matter if it's cold or worm.

I removed the keyboard to check the fan, and it wasn't dirty enough to prevent air flow, and it wasn't stuck either, since it can rotate freely.

Could this be a Thermal Paste issue or something else? What else can I try to fix this?
4 REPLIES 4
HP Recommended

Hello ,

 

 

I request you to first perform Dry boot then update latest BIOS using link given:

 

Please follow the below-mentioned steps to perform a dry boot on the unit:

 

  1. Turn off the unit.

 

  1. Remove the battery and the AC adapter from the unit.

 

  1. Remove all the external devices attached to the unit.

 

  1. Remove any additional memory upgraded on the unit.

 

  1. Press and hold the power button for 45 seconds.

 

  1. Re-plug the AC adapter  & Battery and turn on the unit. Check for the occurrence of the issue.

 

And then try updating the latest BIOS using below link:

 

https://support.hp.com/in-en/drivers/selfservice/swdetails/hp-probook-6455b-notebook-pc/4174254/swIt...

 

Please reply back with the status of the unit.

 

 

 

 

//Click on Kudos and Accept as Solution if my reply was helpful and answered your question//

 

I am an HP employee, supporting the HP Experts who volunteer their time and technical knowledge to help others.

 

 

 

 

HP Recommended

Hello,

Please follow this procedure.

It seems the system is overheating

1) the FAN is running? does the cable of FAN connected firmly? Does anything block the FAN? is there dust block the air vent?

2) the heatsink is installed properly? the screws all secured? the thermal pad contact CPU/GPU well and there is silica gel for good contact?

 

generally there is hint for troubleshooting:

1) boot to dos or BIOS, if issue persist, it is not window issue

2) minimize the system by remove external device such as HDD/ODD, 2nd memory, WLAN card, usb deivce,

3) reseat cable and parts.

 

I am a HP employee.

**Click Accept as Solution on a Reply that solves your issue to help others**
******Clicking the Thumbs-Up button is a way to say -Thanks!.******

 

HP Recommended

@Piramu_g wrote:

Hello ,

 

 

I request you to first perform Dry boot then update latest BIOS using link given:

 

Please follow the below-mentioned steps to perform a dry boot on the unit:

 

  1. Turn off the unit.

 

  1. Remove the battery and the AC adapter from the unit.

 

  1. Remove all the external devices attached to the unit.

 

  1. Remove any additional memory upgraded on the unit.

 

  1. Press and hold the power button for 45 seconds.

 

  1. Re-plug the AC adapter  & Battery and turn on the unit. Check for the occurrence of the issue.

 

And then try updating the latest BIOS using below link:

 

https://support.hp.com/in-en/drivers/selfservice/swdetails/hp-probook-6455b-notebook-pc/4174254/swIt...

 

Please reply back with the status of the unit.

 

 

 

 

//Click on Kudos and Accept as Solution if my reply was helpful and answered your question//

 

I am an HP employee, supporting the HP Experts who volunteer their time and technical knowledge to help others.

 

 

 

 


 

Hi Piramu_g!

 

I am the original author of this thread. Weirdly, I couldn't log in with my original ID, so I had to re-create a new account with the original e-mail adress but a new nickname/seudonym.

 

I tried your method, but the BIOS is already updated to the latest version, so I couldn't proceed any further.

 

What else can you suggest?

HP Recommended

@sathya11 wrote:

Hello,

Please follow this procedure.

It seems the system is overheating

1) the FAN is running? does the cable of FAN connected firmly? Does anything block the FAN? is there dust block the air vent?

2) the heatsink is installed properly? the screws all secured? the thermal pad contact CPU/GPU well and there is silica gel for good contact?

 

generally there is hint for troubleshooting:

1) boot to dos or BIOS, if issue persist, it is not window issue

2) minimize the system by remove external device such as HDD/ODD, 2nd memory, WLAN card, usb deivce,

3) reseat cable and parts.

 

I am a HP employee.

**Click Accept as Solution on a Reply that solves your issue to help others**
******Clicking the Thumbs-Up button is a way to say -Thanks!.******

 


Hi sathya11!

 

I am the original author of this thread. Weirdly, I couldn't log in with my original ID, so I had to re-create a new account with the original e-mail adress but a new nickname/seudonym.

 

 

Like I said on the original message, I dissasembled the keyboard in order to check for any fan-related issues, but everything seems normal since it moves freely and it has no excess of dust blocking the air vent and preventing air flow. And the fan is running when the laptop is on, so it's definitely working OK.

 

 

I haven't checked the heatsink since I have no thermal paste at hand and I wouldn't like to unmount the heatsink without replacing the existing thermal past, but as soon as I do that, I'll let you know the results.

 

 

If I boot to BIOS or DOS, it will shut down in no-time, especially when it's already warm from use. If I let it boot to Windows, it stays on normally.

 

 

One thing I do notice is that the fan keeps running at full throttle during the whole boot-up process, and also when I boot to BIOS or DOS, and it will only slow down once the blue Windows 7 logon screen starts loading. Is that normal? Does it indicate any heat issue?

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