Sony Vaio VGN-NW21ZF 15.5 ?

Condition: for parts or repairs Memory (RAM): 4 GB Processor Type: Intel Core 2 Duo P7450 Processor Speed: 2.13 GHz Graphics Processor: ATI MOBILITY RADEON HD 4570 Hard Drive Capacity: 512 GB Display Size: 15.5 in. Primary Drive: BD ROM/ DVD Writer (Blu Ray) This laptop is faulty. It no longer powers on (most of the times). When it powers on it can work for anything between a few minutes and a couple of hours. It could still work over an hour on battery. Power supply included.