My iMac will not power on .

It does absolutely nothing, not even for a second?

Resetting your Mac's PRAM and NVRAM - http://support.apple.com/kb/HT1379

When to reset NVRAM or PRAM - http://support.apple.com/kb/HT1895

Texas Mac Man's PRAM, battery, PMU tutorial - https://sites.google.com/site/macpram/mac-pram-nvram-cuda-pmu-battery-tutorial

Intel-based Macs: Resetting the System Management Controller (SMC) - http://support.apple.com/kb/ht3964

it does nothing. tried a differnt wall socket and still nothing

Hi I have some weird problem related to this and unfortunately either or apple or APS able to solve.

I have picked a 27 iMac late 2012 model 2 montsh back and a APC Back up UPS 700.

Whenevr I turn on the Main power> Turn on APC> Turn on iMac, the iMac doesn't turn on. I will have to unplug it and plug it back it works. It happens only when I start the UPS for the first time in the day. After that how many ever times I remove my iMac plug and plug it back to APC, it turns on.

Initially I thought, it is the problem with the UPS and contacted APC where they replaced with a new UPS and its the same problem.

Unfortunately, Apple is not able to tell that its the problem with the Apple iMac as it works fine when directly powered without using APC.

So, the problem lies working with APC and iMac together.

Could someone please help. The last option I have is to carry the UPS to a Apple store and see if it works fine with any other iMac.

Also to mention, I did try SMC reset adn PRAM reset.