Hi did you solved the problem on HP DV6-6000 HPMH-41-AB6200. I have same issue on DV6-600- HPMH-41-AB6300. Its not power on. i checked there was no 5v out from PU4. I just removed and checked PQ115 but it is working. I solder it again. Now the power is coming laptop is working without any problem. if i switch off it again and remove the power adapter. the same problem coming again.