Disk utility cant see any disk

[koden]

I have this imac late 2009.

Starting up with question mark and stops there.
It also have blue vertical stribes which indicates GPU error.
( I know how to fix that, but want to be sure the rest works before that).

Have a high sierra boot USB dongle

Booted up and choose disk utility

imac could not see my harddisk.

removed disk and put in a SSD disk that I know works.

Booted up again on high sierra

Disk utility can still not see any harddisk.

beside a faulty cable what else could be the problem?

If it's cable to harddisk, where do I find "the other end" of the 2 cables in the disk?
(power and data).

 

[Fishrrman]

Before you spend another dime on it, consider its age -- might be time to start looking for something else.

 

[koden]

I know... but for my use its perfect. have another and there is no better PC for daily use.
A PC that looks nice on table

 

[BrianBaughn]

The other end of the data cable is probably on the other side of the logic board. What model, exactly, do you have?

 

[koden]

late 2009....

 

[DeltaMac]

Screen size helps, too... 21.5-inch, or 27-inch?

 

[koden]

27"

Certificate problem... I read something about certificate ran out in nov. 2019

How to Fix “application is damaged, can’t be used to install macOS” Errors

If you have attempted to use a MacOS installer application recently, you may discover an error message stating something like “This copy of the Install macOS Mojave.app application is damaged…

osxdaily.com

I will get and create new installer and try again

maybe change / check clock

Set the System Time in Mac OS X from the Command Line

The clock in Mac OS X sets itself automatically by default, but if you want to set the precise time or are looking for a command line solution to set system time, you can do so with a tool called n…

osxdaily.com

[automerge]1581880565[/automerge]
date changed to sep. 3 2019
And install goes on with no error...

So it was the certificate problem from october that was the problem.