(N16) Boot Processing - issues - POST failed, Boot device not found, Bootmgr missing,

Published: 02 February 2023
on channel: Latif Shaik (latiftechnotes)

20230202 152553
Boot Processing:
Step by step process of -When power on the System/PC to User’s working Screen
POST -Power On Self Test
-system tests itself all components (main - CPU,MB, RAM,BIOS….) working or not
-POST Success next step
1 beep sound or no beep
Keyboard - led blink once
Power LED and HDD LED Blink
On Monitor something -like bios, PC logo’s, OS loading,error – shows
-POST Fail - troubleshoot
no beep , multiple beep , continues , long / shot beeps- based on BIOS manufactures & MB
No display -blank screen, Nothing on Monitor , NO HDD led blink, KB - led no blink,
Use POST Card to get to understand what is the ISSUE/ Error
Any of component(main) is failed , not connected , improper connection, incompatible
most of the cases RAM loose ,RAM slots dust, RAM failures , not properly connected
CPU
MB - chips sets, power distribution
Disconnect all power connections - clean RAM connection, remove and reinsert , cross verify
2. POST Success-check Boot priority in BIOS locate OS device
ex. OS in HDD - Locate MBR Record
MBR record tell - no. of partition ,Sizes, type, primary, OS partitions,
bootloader location
– on screen “Boot Device not Found” or “bootmgr missing”
–HDD is not working /failed, not connected, no OS in HDD, OS is corrupted
–BIOS setting - check HDD available - yes - OS in hdd issue
-no - check hdd connected, cross verify - replace HDD
-bootmgr corrupted
-OS issue - connect OS’s install disk - DVD/Pendrive(or repairdisk) -repair options - win 7 – copy bootmgr file from installdisk/repair disk to C:drive
win10 - Troubleshoot - Advanced options - startup repair
-if you have - System Image Backup - restore into HDD/New HDD
-otherwise - Reinstall OS again

3. Locate MBR record - Bootloader - Load Bootloader into RAM
-Bootloader - Windows vista,7,8,8.1,10 - bootmgr
-Win XP, 2000,2003 – NTLDR
Linux - LILO, GRUB-GRUB2
-bootloader tell location of OS and How to load OS
–unable to find bootloader, bootmgr missing – as 2nd step

4. Load OS

5. User will login screen, Login- Startups,Services, applications…

-PC running slow?
-PC startup time or boot time ?
–startups - applications starts once OS is loaded-login (once system is started)
–uninstall application if no longer required (unnecessary apps)
–disable the startups (Task Manager - Startups - rt - app - disable)
—Services.msc – goto a service stop manual/disable - OracleServiceXE - STOP - Manual
—-------------

On this page of the site you can watch the video online (N16) Boot Processing - issues - POST failed, Boot device not found, Bootmgr missing, with a duration of hours minute second in good quality, which was uploaded by the user Latif Shaik (latiftechnotes) 02 February 2023, share the link with friends and acquaintances, this video has already been watched 43 times on youtube and it was liked by 0 viewers. Enjoy your viewing!