Black screen, caps lock blink once in few seconds, f12(wifi key) have red amber light

[Rahul_Then]

Case 1: I put my laptop on sleep mode with power plugged in. Later due to power cut it switched off. After some time when I turned on laptop when power came it shows “black screen ,caps lock key is blinking once after few seconds and fan is off, DVD drive is working”

Case 2: screen came showing hp logo and configuration messages and laptop suddenly switched off.

               Another time screen came showing message “ preaparing for automatic repair” and after few seconds laptop    switched off automatically.

Case 2nd happened very rarely one or two time.

But now my laptop in condition as described in case1.

[CF4]

Hi

And what does an F2 diagnostic show?   Failing Hard Disk?

[Rahul_Then]

Screen remains blank even if f2 key is pressed, no text or any message , screen remains totally blank just like it is in power off state.

[CF4]

Hi

Could you please expand on the

MAKE, MODEL, OS and SKU?

ESC and F10?

OR

https://support.hp.com/us-en/document/c02693833

Turn off the notebook.
Plug the notebook into a power source using the power adapter.
With the notebook off, press and hold the Windows logo key and the B key at the same time (WinKey +B).

NB: On some notebook models, it might be necessary to press and hold the Windows logo key and the V key (WinKey +V).

While pressing those keys, press and hold the Power button on the computer for 2 to 3 seconds, and then release the Power button but continue to hold the Windows logo key and the B or V key until the HP BIOS update screen displays or you hear a beeping sound (usually 8 beeps).

[Rahul_Then]

Model: HP Pavilion 15-e015TX

OS: windows 8

[Rahul_Then]

ESC and F10 not working

[CF4]

Hi

Featured content

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[Rahul_Then]

Hi


This after several attempts "power key + ESC" , the screen appeared having several option
Selected "Boot from Notebook" option
It shows the error: "boot/BCD missing " something like this with some memory address and my laptop suddenly boots into Windows login with all my data safe

But now as I know " boot/BCD corrupted " and I don't have recovery disc with me now , what should I do because next time when I power on laptop it could show same error or caps key blink.

Suggest me something to deal with this situation

[Rahul_Then]

I have recovery partition (drive) on same laptop , can I fix boot/BCD using recovery partition.

[CF4]

Hi

Perhaps something in this may help.

This First part only works when a valid Recovery Partition is enabled.
If it displays an error message then move onto the Second Part:-
OR if you have data you wish to try and save using the XCOPY command.
Then create your own Repair/Recovery/Rebuild/Re-install media or buy a set from HP.

Turn off the computer.
Disconnect all connected devices and cables, Media Drives, USB drives, printers, & faxes.
Remove media from internal drives, and remove any recently added internal hardware.
Do not disconnect the monitor, keyboard, mouse, or power cord.

Turn on the computer and repeatedly press the F11 key, about once every second,
until the Choose an option screen is displayed, and then continue.

On the Choose an Option screen, click Troubleshoot, and work your way through the screens.

Second Part:-
This may require another PC. Find and Download your .iso from…
(You will need a NON_OEM key for W7);
W8.x and W10 should activate automagically from their embedded licence key.
https://www.microsoft.com/en-us/software-download/windows7
https://www.microsoft.com/en-us/software-download/windows8
https://www.microsoft.com/en-us/software-download/windows10

For when it’s a NON MS OS ( iOS / Linux ) creating the install media.
www.microsoft.com/en-us/software-download/windows10ISO

A 3rd party site is (Courtesy of @CherylG)...
http://getintopc.com/softwares/operating-systems/windows-7-home-premium-free-download-iso-32-bit-64-...

Expand/Extract/Burn the iso Image onto a DVD/USB as needed.
Microsoft’s Creator Tool will make the required DVD or USB.

Even though it has NO actual HP software/drivers included, you may be able to
XCOPY the C:\Users\* area onto a ‘large’ USB stick, via the Command Prompt.

You’ll need to try various drive letters; D:..-..Z: until it’s matched - could be G; mine’s S:

C:\>XCOPY C:\Users\* S:\ /e /i /h (then files like those 3 listed below get copied over)

C:\Users\desktop.ini
C:\Users\All Users\agent.1509128044.bdinstall.bin
C:\Users\All Users\HP Deskjet 2540 series\Help\flash\zoom.swf

Then you can try System Recovery Options / Advanced Options shown in the screenshots.

NB:- W7 Try running a Startup Repair more than once for a full fix.
NB: - W10 Begin with the Automatic Repair, then Startup Settings etc.

From either the C:\ or the X:\ prompt try the following

cd boot
bootrec /FixMBR
bootrec /FixBoot
bootrec /RebuildBCD

If the above FAILS then please try:-
http://www.thewindowsclub.com/repair-master-boot-record-mbr-windows
http://www.thewindowsclub.com/install-windows-7-from-usb
http://www.thewindowsclub.com/install-windows-10-from-usb