Question I replaced my old PSU but now my PC won't turn on

[Manave]

Heres the story, i was not much aware about computers so i bought a budget Pre built PC. Its been 2 years since then and i saved up enough money to buy a brand new GPU, but after a little research i founded out that my PSU wont be able to run my new GPU which is an RX 570. I wanted to upgrade it so bad because i was still using an GT 710 which yall know is really terrible. So being confident that i could install a PSU after watching some youtube videos i bought my new PSU first and installed it also i wanted to say that i didnt bought fans for the PSU i ordered them but they will only arrive next week. But after installing my PSU i simply checked wether it is working or not and my PC didnt start at all. I checked everything i could but no luck. It would be very kind if you could tell me some info about this, also heres some images on my build(just a note my cable management is terrible please forgive me😔)

 

[JEDIYoda]

Your cables are so messy there is no reference points to even begin to try to help you.......
What I would do if I was you is I would reinstall the PSU and make sure it is installed neatly with everything being in view....as it is there is no way to tell what your cables are connected to.......also if this is a joke sorry i tried to help....

 

[pcgeek11]

First it is filthy. Clean that mess up.
Second you have all the cables bundles on top of the CPU Fan. Are any parts blocking the fan from turning?

Get some order and a better picture and maybe someone could point you in the right direction.

When you say it didn't start does that mean there were no indications the fans didn't turn and no sign of power being applied?

Make sure you didn't unplug the start switch from the motherboard header.

How to Troubleshoot a PC Power Supply - Newegg Business Smart Buyer

A faulty PC power supply belies many intermittent computer problems. This is why experienced PC technicians often look first at the PSU when diagnosing PC hardware issues

www.neweggbusiness.com

How to: Test a power supply unit

If your system is having issues turning on, you can check if your power supply unit (PSU) is functioning properly by performing a test. You will need a paper clip or a PSU jumper to perform this te...

help.corsair.com

 

[UsandThem]

It almost looks like a PCIe (GPU) cable plugged into the CPU power connector.

But outside of that, just like another user already pointed out, we can't tell for sure based on the one picture of a rat's nest of cables over the CPU.

 

[HomerJS]

Unplug PS and disconnect. Take a paperclip and jumper the POWER connector. Find green power pin and one of the grounds. Plug back in and turn on. Fan should start spinning which means PS is likely fine.

Like others have said do a little cleanup