I have a couple of E6520 laptops, and the one that I just rebuilt and loaded all of the lates drivers and bios a13. This unit will not post if docked. The other one posts just fine and it is in origional condition with the stock Intel video drivers.
Depends actually on what you have loaded in your other E6520 which gives a lot of compatibility issues.
Who wouldn't want a piece of something, eh?
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Try reverting the BIOS back to A12. How many E6520s do you have? Will it show the same problem with A13 BIOS? Let me know of the results, glad to help!
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