What was the manufacture date of hp pavilion dm4 laptop

The laptop can be in the external monitor mode or the white lite for the laptop screen is bad.

try the flash drive on another machine.
Is the drive USB 1 ...1.1 2.0 ....3.0

what are the ports on your machine?

Please use F11 key (tap it during booting process) and follow the instructions.

Take a look at this listing on Ebay. Genuine HP Pavilion DM4 Power Button Board Cable 6050A2406101 OEM TESTED

Tips to increase battry life:
-----------------------------------
1. Never charge when battery already full.
2. Keep low Brightness.
3. Keep volume medium.
4. Always use headset to hear songs or see films.
5. High graphics games never play on laptops it reduses your lapy's battery life.
6. Never use laptop up to 0% battery power.
7. Close background processes using task manager(these processes not essential but consume battary.

here you go
http://bizsupport1.austin.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=us&taskId=120&prodSeriesId=4150055&prodTypeId=321957&objectID=c01983909&printver=true

I have HP pavilion dm4 1265dx laptop and it has not bluetooth , so if some can help me!!

Try to restart your machine first see if that fixes the problem. If that doesn't work, then go Here.

Pick your windows version (32-bit or 64-bit) Then under "Keyboard, Mouse and Input devices" look for
Synaptics TouchPad Driver

You might want to borrow a external Mouse (USB) for easier navigation.

Hello ,
just look and dissemble.
Instruction linkhttp://www.insidemylaptop.com/replace-lcd-screen-hp-pavilion-dm4-laptop/

Hope it will help you.