I Had problems wHit my G5 (2005) and tHe repair sHop cHanged te motHer board under warranty. THe computer came back witH a defect DVD/CD writer tHat was working before tHey cHange motHer board. I sent back tHe computer and tHey repaired it again. Computer came back and now tHe letter H (lower case) is not working. I tried several keyboard and tHe letter H lower case does not work but upper case H works. THe repair sHop cannot find tHe problem. Anyone encounter tHis issue? I reinstalled OSX, reformatted my a disk and notHing is working to correct tHe problem. Anybody can Help!