johnklos said:

Does the headphone jack work?

The CPU is socketed. I've done many swaps - it's not hard, plus it gives you an opportunity to replace the old thermal grease.

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Without HDMI, no outputs at all.

So far OS X is surprisingly tolerable on a single-core, but VNC sluggishness over WiFi might be masking it. (Speaking of WiFi, it's struggling to remember to connect as well.)