Dell G15 5515 Ryzen edition not turning on

First check the Bios if BIOS Recovery from Hard Disk is enabled or not it will help you to recover the firmware into USB.

Restart 4-5 times using power button to shut down while loading will lead booting into Advanced windows Startup, this will make windows perform an advanced startup go to Troubleshoot -> Advanced Options-> Command Prompt

1.Copy the Commands:-

bootrec /rebuildbcd

This will rebuild all Booting related errors

If Windows installation window pops up type "Y" to proceed installation

If not Follow the Steps below:-

attrib c:\boot\bcd -h -r -s

-h :- hidden attributes

-r :- Read-Only attributes

-s :- System attributes

ren c:\boot\bcd bcd.old

renames old bcd

bcdedit /export c:\bcdbackup

bootrec /rebuildbcd

2. For easy repair go to Troubleshoot -> Reset this PC -> Keep my Personal Files.

I Hope this might help..

@Mr.G_Series​ The PC doesn't do anything else than having a black screen.

@ChristopherDF​ Than It is probably a RAM related issue

The Main Reason of Fault in RAM is commonly Excessive Heat, Overclocking, Factory Faults. If you were doing any RAM excessive task it might have lead to Blue Screen of death and gone Black Screen.

@Mr.G_Series​ It's not RAM related, diagnostic LED doesn't find anything wrong with RAM, it happened after an update, most probably BIOS related

Hmm.... OK! CMOS Battery, I think you to get the System to a technician and he can help you cause the BOIS issue is related to Motherboard and changing a CMOS Battery or Main Battery cause G15 does not have socket for CMOS Battery so Motherboard is totally Dependent on Main System Battery.

@Mr.G_Series​ This laptop doesn't have a CMOS, it uses his own battery, and i tried an hard reset, removing the battery and holding down power, but nothing.

I am Afraid that Motherboard is might be damaged :(

Check If graphic Driver is Faulty reset it by :

WIN+CTRL+SHIFT+B

It's on going issue with the latest BIOS update.  Unfortunately, if your system did the latest firmware 1.19.0, it could not be downgraded without a BIOS bridge firmware.  Dell removed those versions and the current stable one is 1.16.0.  

If that was the case, you can use the process here to flash the firmware back to 1.16.0.  Note that you try at your own risk.

After you can restore your system function, go to BIOS settings and disable UEFI firmware capsule update to prevent future automatic update.  

My BIOS version is 1.24.0 

@Chino de Oro​ I cannot use the .exe cause i don't get into windows

@ChristopherDF , the solution worked for similar issue as in this thread  https://www.dell.com/community/en/conversations/inspiron/windows-update-dell-firmware-119-broke-my-laptop/668ee4314a20ad302848230d

@Chino de Oro​ Yes but i don't get a Windows boot like them, second monitor shows nothing

Download and put this BIOS_IMG.rcv on a FAT32 formatted USB drive.  Remove the boot drive from your system and performing a BIOS recovery.  It may not work but anything worth a try at this point.

To perform recovery, remove AC adapter, plug in your recovery USB drive.  Press and hold Ctrl + Esc key and connecting AC adapter.  When the keyboard backlight lights up, release the key and hope for the screen to display recovery menu.  Select Recover BIOS when it does.  If not, try the process a few times until it can trigger the recovery menu.

The reason for removing boot drive is to use selected version recovery image from USB instead of the latest image from boot drive.

@Chino de Oro​ Thank you but it didn't work, gave me the "invalid" LED, gonna have to wait for a new BIOS so I can flash that, since I can't downgrade.