mbr 3 error

Hi. I run win 7 (64bit) on a ssd drive and use 1tb drive for back up/games etc. The other day the connector snapped on the hdd. I managed to ghost the drive onto a 500gb hdd using Western Digitals software. No problems. Sent drive for RMA and used 50gb drive. Then it Takes ages booting to windows with flashing curser in top left followed by MBR 3 ERROR, then all is ok. If I boot to just ssd drive, its fine. I assumed hdd was corrupt in some way. I got a ne drive from my RMA. Installed it with nothing on it and still get error. I tried to boot to win disc and go to command promt, so I can type Bootrec.exe /FixBootMbr, but as soon as it goes to screen, my keyboard is disconnected, so I cant type. I can use mouse. I try repair start up, but it still comes up with error upon 2nd drive install

Check whether this helps. MBR error 3 with windows 7 | Acronis Community

This error is almost always associated with Acronis software (+ Perfect Disk) and in the absence of any information on it in your post, you may have to dig through countless threads on the subject (Google) and especially in Acronis forums.