Hello, I flashed my HP Pavilion dv7-4280us with an AdvancedMenu mod from the bios-mods.com repository. Now, the laptop isn't able to boot. I read that it's due to an RSA signing problem. The fans come on, and it powers up, but it won't do anything else. It may be worth mentioning that the setting I changed before the failure was the graphics mode. I changed it from hybrid to dedicated GPU. I don't know if this matters, especially since I removed the CMOS battery which should have cleared the settings. I used Andy's tool to extract F.23 and F.29 from HP's website. I renamed the 01448F2x.bin.DEC and RSA.SIG to 01448.BIN and 01448.SIG. The ID under the battery on the system is 163D, but upon inspecting a file in the ROM dump, the path its expecting is one of the following: "HEWLETT-PACKARD\BIOS\Current\01448.BIN" "HEWLETT-PACKARD\BIOS\Current\0144D.BIN" (See thread "How do I extract dump an Insyde BIOS A general way to find the name for recovery") I also tried every name in the PlatformName section of the platform.ini, with and without a leading zero, and the only one that reacts differently with the system is 01448.BIN. With any other filename, the system reads all drives, pauses, and then repeats over and over again. With 01448.BIN, the system reads the drive, and then the fans speed up and it doesn't really do anything useful. It will eventually start beeping with each keystroke, indicating to me that the process has stalled. I've removed the CMOS battery and other power sources for hours, shorted the terminals, booted with and without the battery in, and nothing seems to work. I've also tried all of the key combinations (Windows+B, Fn+Esc, Fn+B, all four arrow keys), even though the correct one for this system is Windows+B (or the arrow keys). I'm not comfortable with reflashing the chip with a programmer, mostly because of my soldering skill. So, any ideas? EDIT: Solved by reflashing the chip with a programmer. See post #18 for details.