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Student
Posts: 1
Member Since: ‎11-16-2014
Message 1 of 4 (8,525 Views)

My HP Probook 4540s is not turning on, the power buttons just keeps flashing on in a loop

So I have had my laptop for little over a year now and before yesterday it was working fine . However yesterday I tried turning it on and now it doesn't even start. When I click on the power button it lights up for a sec then turns off then after a couple of seconds it turns on and then off this cycle has been repeating for a long time not and really don't want to buy a new one , I have tried removing the battery and holding down the power button then plugging in the AC cable but NOTHING seems to work. Someone please help me!
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Regents Professor
Posts: 4,321
Member Since: ‎07-31-2014
Message 2 of 4 (8,491 Views)

Re: My HP Probook 4540s is not turning on, the power buttons just keeps flashing on in a loop

Dear Customer,


Welcome and Thank you for posting your query on HP Support Forum

 
It looks like you are not able to Power ON the Notebook and wanted to fix the issue


Please perform below shown steps to find out if this is a software or hardware issue:

1. Remove all Peripherals and Cables, Disconnect them and try to Power ON the Unit

 
2. Check for LED Light Status and ensure Power Button spring action is normal

 
3. Swap with a known good Power Cord and Power Adapter

 
4. Incase no Adapter is available, Check if the Power Adapter is slightly warm

Note: This will give us a hint that the Power Adapter might be fine

 
5. Do you know if the Notebook was in Battery or Power Adapter Mode when you used it for the last time

Note: Ensure there is no liquid spillage or Power Outage

 
6. Check if the AC Adapter Port is loose/broken

 

Note: If the Notebook doesn't Power ON even with a known good Power Adapter this confirms the Hardware fault with System Board or the DC Power Circuit

 

 

Hope this helps, for any further queries reply to the post and feel free to join us again

 
**Click the 'Thumbs Up Button' to say Thanks**

 

Make it easier for other people to find solutions by marking a Reply 'Accept as Solution' if it solves your problem.

 

Thank You,
K N R K
Although I am an HP employee, I am speaking for myself and not for HP

I am an HP Employee
Student
Posts: 1
Member Since: ‎08-12-2015
Message 3 of 4 (7,324 Views)

Re: My HP Probook 4540s is not turning on, the power buttons just keeps flashing on in a loop

i have the same problem but when i remove the ram and put it again its work for once!!

what its the problem ??

Student
Posts: 1
Member Since: ‎09-13-2016
Message 4 of 4 (4,658 Views)

Re: My HP Probook 4540s is not turning on, the power buttons just keeps flashing on in a loop

The laptop powers on when the battery is removed and the power adapter is connected. Does this mean the problem is the battery?
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