Please press F 10 key continuously to enter the BIOS after booting, and check whether this phenomenon exists in the BIOS interface. Then, according to what you see, refer to the following suggestions:

1. If the BIOS interface is not like this, it is likely that the graphics card driver is not installed correctly or there is something wrong with the system. I suggest you reinstall the graphics card driver. If the effect is not good, please save the data, and then reinstall the operating system or try to restore the system. ?

(1) Graphics card driver under Vista system:

FTP://FTP . HP . com/pub/soft paq/sp 4200 1-42500/sp 42479 . exe

(Graphics card driver under WIN 7 system:

FTP://FTP . HP . com/pub/soft paq/sp 4500 1-45500/sp 452 16 . exe

2. If this is also the case with the BIOS interface, it is likely that the hardware such as the graphics card or screen is faulty. In order not to delay your use, please send your notebook to the nearest HP Gold Service Center to check the specific reasons and then handle it.

You can check the nearest HP Gold Service Center through the following website:

/zh/support-drivers/e support/as CPPS . html

I hope the above reply can help you.