If nothing else works you can try baking your GPU.
Remove maximum amount of plastic material from it and put it in the oven for 10-15 min at max temperature.
If you're lucky it may be revived.
Still waiting on my OTA update which'll enable 120 Hz, but can't wait to experience 120 Hz VR Games already received a good boost going from 72 --> 90 Hz, 90 --> 120 Hz will be GREAAT ))
Its good be good if there's believable interaction with NPCs and objects (there isn't much in the original game tho) Lets see how it is next week in the Oculus Gaming Showcase.