I have got start up problem with one friend of mine's laptop. I'd like to hear your opinion just to confirm whether I've detected the faulty hardware. It is laptop HP Pavilion dv9500 and I knew that that model of laptop has a lot of problems related to graphic chip or motherboard. I did perform some hardware dignostics and turned out that it's faulty video chip.I did reflow on video chip by using a heat gun and got it worked but when the laptop is connected to external screen only. I've even managed to reinstall OS while the laptop was still connected to external screen. The problem is that nothing came on the laptop screen itself. Then I thought it's likely to be a faulty lcd screen inverter or the laptop screen itself. I did replace lcd screen inverter with new one but still no luck. The only problem left to be a faulty laptop lcd screen. I'm about to buy new laptop lcd screen but before buying it I'd like to make sure that the problem is definitely with the laptop screen itself.
Any advice or help will be really appreciated.
Thank you in advance.