Computer won’t turn on for good

[PeterOz]

optiplex 790

This will have a seven digit service tag.
Please post the number.

[PeterOz]

Also can you see the ssd in the bios

[Uncrow]

This will have a seven digit service tag.
Please post the number.

Hi !
The seven digit service tag is : F1RL55J

[Uncrow]

Also can you see the ssd in the bios

Yes I can see it, here’s the whole “system information” tab, it is labeled as a hdd, and it does have 480Gb :

First part :

https://i.ibb.co/DRzpKDw/IMG-4934.jpg

Second part :

https://i.ibb.co/WDH53b9/IMG-4935.jpg

[Uncrow]

And I have again a new problem, often, when I try to boot up the computer it reboots itself once or twice before really starting. And while writing this message the USB DRIVE FINALLY WORKED WITH THE ISO ! I got to the windows installation screen FINALLY. I’m currently installing it and going through the process.

[Uncrow]

Anddd it rebooted mid-installation so it did not complete it

[Uncrow]

Ok so it seems it have indeed installed windows now, I tried booting up the USB Drive using the BIOS boot menu key. Now that it is installed I went to the BIOS menu to change the sequence of booting, I did something like (First to Last) → PC0 : multiplenumbersandletters → I don’t remember the name → USB Drive → Diskette, and then I rebooted the computer and now I’m on the windows “preparation” page, I’ll keep updating the post.

[Uncrow]

By the way I forgot to mention that I removed both of the “2Rx 8Gb” Ram, don’t know if it had any incidence but I’ll try to put them back into it once the windows installation is over, right now I’m configuring it, choosing the language and everything

[Rustys]

1. How many DIMM Slots does the system have?
2. Make and model of the RAM?

[Uncrow]

1. How many DIMM Slots does the system have?
2. Make and model of the RAM?

1. There is 4 DIMM slots
2. It’s “Sk hynix | Korea” 4Gb each, I have 4 of them, 2 are “2Rx8 PC3” and 2 are “1Rx8 PC3”. Both 1333Mhz if I’m correct.

[Rustys]

This is the information I have to have.

[ATTACH alt=“Screenshot 2023-07-25 095617.png”]12372[/ATTACH]

I have 4 of them, 2 are “2Rx8 PC3” and 2 are “1Rx8 PC3”

Mixing RAM like this causes issues as @PeterOz stated before.

I already tried to unplug the computer, and since it works without the 16Gb of ram, it is obviously linked to it, however I tried alternating between the two “1Rx8” memory and the two “2Rx8” memory and both works, just not all 4 at the same time.

Which validate that here in this statement.

[Uncrow]

This is the information I have to have.

[ATTACH alt=“Screenshot 2023-07-25 095617.png”]12372[/ATTACH]

Mixing RAM like this causes issues as @PeterOz stated before.

Which validate that here in this statement.

Ok ! So if I wanted to have 16Gb I would need to have either 4 “2Rx8 PC3” or 4 “1Rx8 PC3” and then that could work ?

Here are 2 picture of the information you need for both RAM, and I just noticed that one is CHINA while the other one is KOREA :

[ATTACH type=“full” width=“600px”]12376[/ATTACH]
[ATTACH type=“full” width=“598px”]12375[/ATTACH]

[Rustys]

Ok ! So if I wanted to have 16Gb I would need to have either 4 “2Rx8 PC3” or 4 “1Rx8 PC3” and then that could work ?

That is correct.

[Uncrow]

That is correct.

Ok well that explains everything ! Thanks a lot for the help

[Rustys]

Once you get the matching memory you should be able to have the 16 GB. Untill you get them you can use the 2 that are matching.