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Gigabyte GA-Z87X-UD5H. Infinite loop at boot time. Debug code 15

During the boot sequence the computer gets stuck with the error code 15 ("Pre-memory North Bridge initialization is started."). After 15 seconds (more or less) the boot sequence restarts. My memory cards are inserted in the grey slots (DDR3_1 and DDR3_3). Also I`ve inserted only one at a time in DDR3_1 and I get the same error.
2x8 Gb memory cards compatibility checked (Corsair CMZ16GX3M2A1600C10)

It seems some mobo problem, but i don't know if I can configure something.

Some ideas?
Txs in advance.
3 answers Last reply Best Answer
More about gigabyte z87x ud5h infinite loop boot time debug code
  1. Best answer
  2. Not so easy ...
    I've tried all tutorial's solutions. Also I've open a case at Gigabyte support

    Thank you for your response
  3. Finally I found a few pins bended at the mobo's CPU connector.
    I think that this is the problem.
    Someone know if I can get the mobo refurbished?

    Txs...
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