I accidentally turned off my R1 with the power button. Since then it boots with about 5 different scenarios. Rarely will it boot normally. Sometimes half boots, sometimes cursor in upper left flashing, sometimes says previous overclocking failed, sometimes says choose correct boot device, etc. Had a PC guy look at it - no luck. Says maybe mortherboard. Looks like memory and hard drive (SSD) are OK. Any ideas how to fix it?