Originally Posted by Jedi Mind Trick
I recommend unplugging the PSU from everything, hooking up just the pump to the PSU (with an adapter if necessary), and then starting it up with a paperclip or something (look for a pin out/see which pins need to be connected).
Personally, I have a old external 5.25" kit (sata/IDE to usb + small power supply with a single molex connector) that I use just for stuff like this. Saved my dumb self a few $$ more than once (got distilled water all over everything because sometimes I cannot think properly. Wound up air drying stuff for 24hrs a few times, but no computer for a day or two > no computer until having enough money to replace what died.
Personally, I took a cheap $20 psu I got off Amazon. Did a little modding ... I.e. snipped the power leads on the 24pin and soldered in a small switch with an extra 18" of wireing, then terminated everything but a single molex and sata cable. I use that as my watercooling test psu.
On a side note, you can also pick up a 24pin adapter that shorts the power lead for you allowing you to use power switch on psu, with adapter for 3 or 4 pin fan connecter you are golden.
Just my 2c
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