Sony Vaio switchable graphics

[Xavier Andres]

I have a Vaio PC with Windows 8 (i5-3210m, with Intel HD 4000 and radeon 7570/7670m). I had to format beacuse I had viruses, but in the recovery process I had an error (505:77) with the graphics driver, but the recovery finished. When I opened the device manager I found the intel graphics installed, but amd video card doesn't appear. In the BIOS my discrete graphics is turned on. Any solution?

 

[Phillip Corcoran]

The driver won't install if the device (ie the Radeon card) is broken & undetected. I suspect that's what has happened to yours - - it's broken.

If it wasn't broken and just needed a driver, it would be shown in Device Manager as an "unknown device" with a yellow question mark. So if it's not listed at all, it's broken.

Fix? - - new laptop.