My HP Mini 110-3135DX suddenly stopped working after being left in hibernate mode. Now there is a black screen. No flashing lights or sounds. Hard reset (removing battery and power cord, hfolding power switch for 20 seconds) did not change anything when power cord was reconnected. What happened, and what can I do? Chuck

SOURCE: hibernate mode

Remove the memory for about a minute or two, turn on the machine with no memory; then replace the memory, it will fire right back up.

SOURCE: dv2120us keyboard buttons light but screen black, won't boot

Hello Atty

I understand that your Notebook is not powering on. Your Notebooks , that is dv2120us is having a manufacturing defect. So HP accepted that the Notebook will be serviced under the plan "One Time Service Enhancement" . Even if the Notebook is out of warranty your Notebook may be serviced. For more information log on to the chat support .

.http://welcome.hp.com/country/us/en/contact/chat_1.html

They will assist you with the details and the procedure, how to send your Notebook to HP for service.

SOURCE: after powering up hp pavillion dv9500, screen still remains black

First, follow the instructions listed in the link below to find if the issue is with the Hardware or not :
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=us&objectID=c00372748&jumpid=reg_R1002_USEN

However, to remove and reseat the Memory Modules, you should find the required instructions from the Manual which is available throug the link below :
http://h10032.www1.hp.com/ctg/Manual/c01295898.pdf

Find the required instructions to remove and reseat the Memory Modules in your Notebook from page number 54 (62 of 176) in the Manual.
Unfortunately, if the issue persists and if the Indicators, I recommend you to try connecting a Desktop Monitor to the VGA Port of the Notebook when the Notebook is powerd on and press hold the FN key (Located on the left bottom of the keyboard near ctrl key) and press the F4 key once to toggle the display on the Desktop Monitor.
If there is no display either on the LCD of the Notebook or the Desktop Monitor connected, the issue can be with the Motherboard of the Notebook.
However, if there is display on the Desktop Monitor connected, the issue can be with the LCD of the notebook or the Connector on the Motherboard.

In this situation, you can try installing the latest BIOS Update specific for the Model Number of your Notebook.
However, I recommend you to try checking the Warranty Status of the Notebook by entering the Product Number and Serial Number of the Notebook in the link below :
http://www13.itrc.hp.com/service/ewarranty/warrantyInput.do

You can find them both printed on a white sticker pasted at the Bottom of the Notebook indicated by S/n and P/n .

If the Notebook is found to be In Warraty, you can contact HP Support and get the Notebook repaired.
However, if the Notebook is out of Warranty, you need to visit any nearest HP Authorized Service Centers and get the notebook examined and repaired.
Hope this helps....

SOURCE: HP Pavilion dv4000 battery won't charge

all you really need to do to find out if it might be broken is to check and see if that DC Jack on the computer is "wiggling" around, if the center part is moving around. If it is, then there is a chance that it is broken. I used to work at a computer store where the owner would resolder new DC power Jacks into laptops, but he was the only one in town who did that. So you might want to check around at the local computer repair or electronics stores to see if someone does that type of thing. Also, have the power supply checked out, it could just be dead.

SOURCE: HP Pavillion Entertainment PC screen blank, power lights on

try this put off the laptop and remove the battery and the power cable and then hold the power button from 30-60 seconds then put back the power cable(without battery) and switch it on it should work then shutdown and put battery pack in