No bios Welcome screen nor windows boot up only lightdark color screen

No bios Welcome screen only light-dark color on screen mostly while Power ON physically-button on desktop
(its been over 4-5 months to date now)

1------I cant see Asus BIOS Logo nor Windows 11 Pro 21H1 boots up ( even waiting for 1-2 mins no action while sometime after 2nd min Bios logo appear and then windows boot up

2-----I had to press RESTART-Physical button in this stuck light-dark-situation then after total-restart I can see Bios-Logo & windows boot up
only after pressing Restart-physical button is the only way to start PC for 97% of my time

3-----Note:--after windows 10 successful launch
~~~A-------If I restart using Windows 10 software-level then BIOS-LOGO+WINDOWS-BOOT-UP all OK over 97% time
~~~B-------If shutdown then next time same issue no bios-logo nor windows-boot only light-dark screen

System Info--
CPU-- i7-4770K auto OC running at 4.2Ghz
Motherboard--- Asus Z87 Deluxe with BIOS version Version 2103
RAM-- G.SKILL 32GB DDR3 At XMP profile 2400Mhz
Graphics card -- MSI Ventus 2XFan- RTX 3070 8 GB
NVME SSD --Samsung NVME 970 EVO Plus OS Boot drive using NVME Adaptor on PCIe over 11 months to date with TRIM enable
HDD-- 2X WD 1TB on RAID0
PSU-- Corsair 750 Watt Enthusiast Series TX750 Model

solutions tried--
1---- fresh install new CMOS Cell and try to reset bios
2---- changing GPU from GTX 1060 6GB & RTX 3070 8gb
3---- Windows official update
4-- AHCI mode and clean RAID mode in past

pic1-Asus Z87 Deluxe with latest motherboard Bios

I just tried holding down Shift key while clicking shutdown button
PC shutdown but when I have to power On and I press Start-Physical button Same issue light-dark screen without any bios-nor-OS logo at all
I have to press physical restart button then it is the only way to get inside the PC

i read msg late sorry for that
I need some help , kindly suggest

- - - Updated - - -

I reset the Bios using F5 key but Propery-Normal-startup behavior have the issue till now

this is the Mobo pic with buttons
note.- on the back of the Cabinet side mobo only have BIOS flash button

If Your Motherboard Gets to 00A0 it should mean that the machine Posted properly.
I read the initial description couples of times, and the only thing that comes up in my mind:
is some kind of strange Power management or compatibility issue.

I would Strip the machine to it's simplest expression (Board/CPU/RAM/Boot Disk) and try it like that. Then if all goes well. Start putting back addons one by one and test between them, until the problem comes back.

It looks like your machine gets in some kind of twilight zone when shutting down.

You can also watch the post code when your machine starts and note the code displayed when it stalls during POST sequence.
This can also give you an insight on what is going on.

@Macboatmaster & @MaloK

Macboatmaster - I remember 5+ months back whenever one of my 1TB Seagate backupPlus USB drive remains attached to PC and I restart or start PC then PC-Stuck-on-BIOS-Welcome screen for longest time
& I had to press restart or hold down power physical button & also to remove that particular 1TB portable HDD
this is nearly-mostly how issue started
but I hardly use that drive during last months and used carefully
Note--HDD Sentinel is showing that all HDD+SSD+NVME have none communication error nor HDD have bad sectors

Details :--
just tried disabling Norton 360 Deluxe boot protection + removed all SATA cables to HDD + Kept only keybord-&-mouse + removed LAN cable too , upgrade BIOS at Version.2103 from Asus bios EZ Flash
also pressed direct PowerButton of motherboard for power-ON and power-OFF

Precautions I took :--
I took driver updates only from Windows updates except NvidiaGPU Driver which is for Geforce experience app
Windows 10 21H1 Pro running smooth + Games are smooth + no crashes at all
@MaloK where to look for 00A0 ?

Here is the Reference

Z87-DELUXE

One good thing with Asus's "Deluxe" Boards... You dont need a POST diagnostic card to display error codes.

Your computer seems to stop at HDD init.

I just cleared CMOS by using CRL_CMOS button
Now pc stuck on without bios logo screen
Unable to boot to windows at all

Tried removing all sata hdd n ssd removed nvme too
Cant see bios option or menu

and mobo ASUS Z87 showing 0062 error here
Need immediate help n options to try please


- - - Updated - - -

Finally find out its PSU issue

since removing RTX 3070 with GTX 1060 Works so smooth
RTX 3070 have 8+8 PINs while GTX 1060 6GB have only 1x 6pin PCIe power
PSU fails to power up RTX with 2x 8pins thats why system stuck at light-dark screen

thanks everyone for great support n ideas
going for ""ASUS ROG Strix 750 Fully Modular 80 Plus Gold 750W ATX Power Supply with 0dB Axial Tech Fan and 10 Year Warranty""