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Black screen in the notebook, no bios

Pavilion DV7 2050es
Microsoft Windows 7 (64-bit)

Hi, i have a noteboook hp pavilion dv7 2050 es, the last week I shutdown my computer and when I on the notebook, only appear and black screen. the battery of the bios fell. Not appear the menu of the bios, even pressing esc. f2 or f10. I tried connect another external sreen but was black too. There is not signal of leds in the keyboard, only when I start the computer they light on once time and no more. I do not have the partition of recovery or the hp_tools. I try to use the hp pc hardware diagnostics 3 in 1 usb key, also put the bios in a usb or in cd (f.42 and f.33) but anything function.

Why i can do in order to re-install de bios?

 

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Provost Provost
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Black screen in the notebook, no bios

 

Try a hard reset.Disconnect all external devices first.

1-remove power cord and battery

2-press power button for 30 seconds

3-reinstall only power cord for first startup.

4-try power on

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Liecer Honor Student
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Black screen in the notebook, no bios

Hi, I did that, but it doesn't work. also i try to remove the memory ram to test they and find a damage, but the computer not work.

 

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Provost Provost
Provost
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Black screen in the notebook, no bios

Unfortunately, it sounds like a dead motherboard.

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