HARD DISK NOT WORKING AFTER MOTHER BOARD REPLACEMEN​T

Mother board of my laptop had to be replaced. meanwhile i had used hard disk from my laptop as external hard disk without formatting. After replacement of motherboard i have reconnected the same hard disk without formatting. but system does not boot up to operating system.

I have this issue before, in my case, its ribbon cable issue. dv9000 have two ribbon cables the one that have broken is the long one, (connect mobo to switch panel). However there is other possibility that the switch panel also broken.
Try buying the ribbon cable first, it is much cheaper compared to switch panel.
Pavilion DV2922TX, XP-SP3 32bit, Intel T5750 2.0Ghz, Nvidia Geforce 8400M GS with 128MB, 4GB 667 DDR2, 250GB HDD

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