HP laptop can not turn on the following reasons:
First try the following operation: remove the battery and power adapter all, hold down the switch button for 30 seconds to discharge the static electricity, wait about 15 minutes, and then connect the power adapter alone to power on the power supply; if you can not turn on the power, which is the following reasons.
(1) the first reason, the laptop power adapter is damaged, can not be energized, or the laptop battery is not charged, from the surface to the boot, black screen. Treatment: Replace the power adapter, or give the battery fully charged can be.
(2) The second reason: ? Is the notebook's memory and graphics card is oxidized, resulting in poor contact with the memory slot or graphics card slot, resulting in the boot, black screen, processing methods:
Processing methods: that is, dial off the power supply, open the laptop's back cover, take out the memory slot, if not welded to the motherboard's independent graphics card is also taken out of the card slot, the parts of the memory and graphics card gold fingers aligned with the memory (that is, there is a copper piece of place) with a few eraser rub back and forth. The eraser back and forth a few times, the ash blew, and then inserted back, cover the back cover, boot generally OK.
(3) the third reason: is that the laptop graphics card video memory appears to be soldered, the main chip performance decline, graphics card BIOS error, control power IC problems, will cause the graphics card can not work properly, that is, the graphics card is bad, due to the graphics card is bad, naturally can not turn on the computer, the black screen, the treatment method: Jianyi repair graphics card, or replace the graphics card.
(4) the fourth reason: the laptop motherboard boot circuit failure, such as clock, reset, power supply, MOS tube failure, may cause the inability to boot, black screen, I/O problems, but also can not start the computer, the black screen, and so on, right, treatment: sent to the after-sales or repair store to repair the motherboard,?