About the only oddball issue I noted is the following, and yes i realize you have a 4GB module. "Some DDR3 1GB double-sided DIMMs with 16 chips may not work on this motherboard. It is not recommended to install them on this motherboard."
IF the RAM works fine in other MOBO's and not in this one and you've tried both DIMM slots resulting in the same failure then --- the RAM simply isn't compatible.
Further, if you cannot boot in to the BIOS to manually set the RAM (Frequency, CAS Timings, and Voltage) then you've got a problem. Installing one set, change the BIOS, swap RAM and cross fingers.
However, IF you have an application that's BIOS invasive e.g. ASRock Extreme Tuning Utility <or> set the RAM manually for a 'different' set of RAM then sure it will probably result in a similar post failure.
Suggestion, install the GeIL RAM then unplug the PSU for 5 minutes, Clear the CMOS moving the the 'Jumper' (see p 21) for 5+ seconds, more back to the default position, plug the PSU back in and 'try' to boot; nice video - http://www.youtube.com/watch?v=rdHH9KrceR0