Ive watched the video, that is why I say you have a hardware failure.
Do you have a psp? If so use your psp to install timemachine ipl. Go to
Dark-AleX - PSP Developer and download timemachine. Then run it on your psp. When you run Time machine installer there is an option (the first one) to install ipl. Choose that and install. After you have installed the ipl take the memstick out of your psp and stick it in his psp. Put your pandora battery into his psp with the memstick that had the ipl on it. Then like you said, pandora boots up so it should boot to XMB.