CPR failed, what now?

[Flare]

My Crosshair V has been paired with a 2.8 GHz Phenom II x6 (locked) and approved memory since day 1. And the other day I tried to get it to 4 GHz by increasing the base frequency and increasing the voltage a little.

The first few attempts failed and CPR reset the machine with stable settings, but the last time CPR did not kick in. The Q-LEDs won't advance beyond the CPU stage, there are no beep codes, all the other lights seem to be working as they should, and the fans spin up. (I'm not certain if they're going full speed or not because I bumped them from silent mode to 90% to handle the extra heat)

I've shorted the jumper, held the back panel button, flipped the battery over, unplugged the machine, pulled the battery AND held the power button to drain all residual power from the circuits, and removed everything but the CPU and RAM to try resetting the CMOS/BIOS to their defaults.

I'm positive the issue is not the PSU or any add-in cards, no hardware changes were made this month and the machine was run daily perfectly stable before this.

Any ideas for fixing it or will I need to replace something?

[oldbrave]

From what you described, I think there is a possibility that you have damaged the MB. You say that you flipped the battery over and in doing that you reversed the + and - connections of the the battery and the MB and I would think that at least the bios chip may be damaged.
If you are unable to get it to post then I think your best move would be to contact ASUS and order a new bios chip. Several members of the forum have done that so I don't think they are that expensive .

[chrsplmr]

Sounds exactly right to me..
if thats all that happened.. lets hope.

Where did you see to flip the battery over..
was that somewhere here? Because I am sure
if that needs to be corrected..it will be.

The follow the steps in the crosshair stickys for setup..
your ram may even be profiled by praz in kippers memory
sticky..
but it sounds bricked to me...c.

[Flare]

Button cell batteries have one contact on one face and the other counts as the other side AND the outer edges, which is where the positive terminal touches, so flipping it over merely creates contact between the two terminals like shorting a jumper. It acts as a conductor rather than a power source.

[NemesisChild]

Please list your system components, including the make & model of your PSU.

Doubtful that flipping the battery would cause any damage to the MB or bios chip.

[Flare]

Mobo: Crosshair V Formula
CPU: AMD Phenom II x6 1055t
RAM: 4x G-Skill Ripjaws 2GB
Video: Sapphire AMD HD 6870
PSU: Seasonic X-650

*smashes head on keyboard for not thinking of this before* I think the CPU got cooked.

I just remembered that my CPU's fan wouldn't start spinning immediately, usually the system was at the login screen before the thing built enough kick to turn over. (silent mode. >_>)

Assuming that the cooler (Scythe Rasetsu with 140mm Zaward PWM fan) had zero airflow during the 5 or so reboots, do the symptoms match a burnt out CPU?

[chrsplmr]

excellent..U r on ur way OP.c.

[chrsplmr]

do u have another compat. cpu to try?

[Flare]

chrsplmr wrote:
do u have another compat. cpu to try?

Nope, nor a compatible motherboard.

[NemesisChild]

Doubtful that you fried your CPU, thermal shutdown occurs at 91c.

The internal die starts to fry/melt at 97c, so it's very unlikely.