What if you, just like us, get a locked Duron, where the BF_FID pins are not connected to the die itself?
The guy from this Xoom page found that the golden bridges at L1 had to be involved. He found out that he could lock his Duron by cutting those bridges. We looked at our CPU and indeed, the bridges were cut while all Durons we have seen up till now had their L1 bridges closed. Don't worry, we can close those bridges again and thereby unlock the Duron.
At the local hardwarestore we bought some Bison Electro Kit. This is a special sort of glue with silver parts in it so it conducts electricity. The stuff is sold to fix VCR's etc.
 |
With a needle we put a very little bit of this glue on the L1 bridges. Now the BP_FID pins are reconnected and we can change the multiplier on every mainboard with onboard multiplier tweaking. The Gigabyte mainboard we used has onboard multiplier tweaking too (after we modified it, of course), so we can change the multiplier.
What we did can be seen on the picture below.
 |
After the mainboard treatment the bottom of the board looks like this: BP_FID is now connected to the pins which go through L1 to L3 and L4.
 |