What did you do to that laptop before the issue occurred?

What is appearing on the display screen after you turn on that laptop?

 

I just flash the bios to 27cn71ww on Windows platform(downloaded from lenovo official website, then it freeze long beep sound and later blank screen. When I turn on the power switch, the power switch is on but the screen is blank and never boot up to Windows or fail to enter in the bios. I try lenovo online help that use crisis phoenix, minidos.sys, bios.wph on a USB thumbdrive. The thumbdrive flash light(fn+r) 2 times and I wait for 2hours, the laptop remain the same with blank screen with power switch light on.

 

I just flash the bios to 27cn71ww on Windows platform

BTW this is why a bios update is only done for a specific reason ie fix a problem, support a new processor, etc. A bios update is NOT done just to have the latest and greatest bios.

 

If you have tried the lenovo recovery procedure and were not successful, then your only real option is to send the laptop in and have the bios replaced OR to simply replace the motherboard. Very often either of these options cost more than just buying a new laptop SO get an estimate prior to having any work done.

 

What is the exact serial number on that Lenovo IdeaPad Y460P?
What country was it purchased in?

 

s/n:qb02578776,
country- singapore

 

I think you used the wrong .wph bios file, the one you mentioned is for the Y460 model, there is a different .wph for the Y460P here :- BIOS Update for Microsoft Windows 7 (32-bit, 64-bit), Windows XP - IdeaPad Y460p, Y560p - Lenovo Support GB
try that .wph file on the USB stick, you can extract it from the download with 7-Zip (which is free).

BTW the Usb stick has to be formatted as FAT.

 

I think you used the wrong .wph bios file, the one you mentioned is for the Y460 model, there is a different .wph for the Y460P here :- BIOS Update for Microsoft Windows 7 (32-bit, 64-bit), Windows XP - IdeaPad Y460p, Y560p - Lenovo Support GB
try that .wph file on the USB stick, you can extract it from the download with 7-Zip (which is free).

BTW the Usb stick has to be formatted as FAT.

Tjs bro this weekend will try it

 

Several Fn + other key combinations are listed here, I would try them all :-

English Community-Lenovo Community

Also the Usb stick needs to 32GB or less so you can format it as Fat32, or 4GB or less to format it as Fat.
I think both types will work but you may have to use Fat with 4GB or less Usb stick.

The link above shows the details.

 

Another option and probably the best option to begin with in the first place is to open up the back panel of the laptop to remove the CMOS battery and re-insert it to restore the BIOS to factory default settings.

 

That will not work if the Bios is corrupted as it seems to be.