i have a 2012 pavilion dv6 6140tx laptop. Recently, the laptop's hdd stopeed working. So i did a hdd test from bios which display this msg, "HARD DISK FULL, ERROR 305". So i replaced hp's hdd(win 7) with sony's hdd which had win 7 on it. But today i cleaned my hp laptop which includes disconnecting fan and motherboard. As soon as i was done cleanning, i assembled the laptop. But when i connected the battery, laptop started on it's own with no display but orange light on fingerprint sensor and mute button and fan running very fast. And when i pressed the power button orange lights on fingerprint sensor and mute button continued to glow with a black screen(no cursor, none of the fn or esc keys work) and windows doesn't load.
Please help.
My laptop's specification-core i7 2Ghz, 4gb ram, 500gb hdd, 1gb DDR5 radeon 6770m