Thank you very much to N.Scott.Pearson for the information posted above.
As it was mentioned above, if you have the option to test a different power supply, please do that, because the problem seems to be related to that.
After trying that if the problem persists, try to test the PC with minimal configuration, using just one memory stick and no hard drive, just to check if the PC keeps rebooting by itself under that scenario.
Please let me know the results of trying the steps above.
Any further questions, please let me know.
I've tested now another Power Supply, the computer doesn't change its behaviour... only two times a was a normal boot up possible, but most of the time the same error: the System is turning on and off itself all the time.
I've tested that with all storage disconnected and one memory stick - I've also exchanged the memory stick for testing purposes and used different memory slots - always the same error.
I think the mainboard is dead...?
Hello N. Scott Pearson:
Thank you very much to for the suggestion posted above.
Thank you very much for providing those results, yes, most of times this kind of problem is related to the board, so, if you can try the suggestion provided by N. Scott Pearson will be great, if not and if the motherboard is under the 3 years of warranty period, then the next step will be to replace it.
If by any chance, the board is under warranty and you are interested in the replacement, please get in contact directly with us through chat, email, phone or online support, you just need to select motherboard on product type and you will get those options:
Here is the link to check if the board is under warranty, or if you have the proof of purchase the warranty will be valid based on the date on it:
Any questions, please let me know.