Question After Undervolting Blackscreen Problem, Cmos is not useful

[JAA4]

Hello Guys,

I have;
Cpu : i3-6100
Motherboard : Msi b150m bazooka
Ram : Hyperx 2xxx mhz 8 gb ram 1 slot
Power Supply : Corsair 80+ VS450

18 may night, i did in bios (because cpu temp was too high like 90 C);

SA voltage: 1120 to 1000,
IO voltage : 0,980 to 0,800 (0,980 was changing like 0,960,0990 smt like that..)
DRam voltage : 1200 to 1000

I save and exit then its gone . Black screen problem.
On motherboard ez debug led CPU is always red.

I tried to cmos clear with screwdriver, remove the bios battery and they are not usefull,

Can you guys help me about that ?

 

[rgd1101]

don't have gpu?
unplug the power cable when you remove the bios battery?

 

[JAA4]

Of course i have, sorry
Gpu : Msi rx 470 8 gb
I tried it actually.
Unplugged power cable then i remove the bios battery and waited 6-7 hours maybe more but its not working.