I connected all the fans to the CPU and fired up the system
Can you please clarify that? I am confused.
as it is a tower it stood upright and to my surprise it cut out once it began starting windows.
Cut out = system power down and everything goes dark?
There was a high pitched squeek during start-up. I decided to disconnet each of the fans one at a time to see if this was causing the issue. It did not work as the system kept cutting out. I suspect that the Antec PSU 550 may not be capable of powering all fans
How many fans are we talking about? An average system should use less than 350W so your PSU should be more than enough. Again, time to ask for a full build config listing.
however with the tower placed on its side rather than upright all the fans worked ( no squeeking) and the system booted up with no issues????? I am completely confused now!! has anyone come across this type of issue before and if so how did you resolve it?
You sure the heatsink is seated properly? If you are on an Intel build, check the 4 push pins and make sure they are firmly in place with the click sound.
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