Flashed a Modded HP DM4 BIOS I finally was able to flash a modified bios for the HP DM4. Here's what I did: 1. Install the base bios that I want 2. Go into the HP_RECOVERY, then BIOS (on the hard drive). There are three folders: Previous, Current, New. HP puts a dumped bios in these folders. 3. Use Andy's tool to modify the bios in Current. 4. Backup the bios folders to a USB drive in case you run into problems later. 5. Put the modified bios (renamed to 01433.bin) in each of these folders (replacing what is there). 6. Shutdown and remove the battery 7. Reboot holding down WINDOWS+B The BIOS Recovery tool will load the modified (dumped) bios and install it. Sadly, my modified bios doesn't allow the machine to boot to a drive (I'm thinking my attempt to disable the whitelist created an infinite loop), so I have to restore an old bios. Anyways, I think this technique gets us a lot closer to modifying the bios in this laptop.
good luck, because the 2 modules involved in WWAN an WLAN whitelist of this bios check are not easy to crack. and removing the battery is certainly not a good idea, flashing tools are usualy checking if AC is on and if battery is charged.
Thanks! Maybe you can answer this for me. If I'm only looking to replace the WLAN card, wouldn't it be sufficient to only modify the ROM file that goes with it? I don't intend to use a WWAN card, so I would think I can leave that alone for now.
you have the choice, using EzH2O.exe "direct memory edit" solution, search and replace the PCI ID of your card, that's the easiest for you, YEN made a tuto somewhere in this thread or AndyP's tool, but you will have to found which of the 734 modules to mod.
@TTAV can you try to see if the modifications I did would likely work? Also, how can I test if I can recover if I get a bad flash. I tried crisis USB stick but laptop will not boot from it. I do not think I can use floppy, because BIOS file itself takes up more space than a floppy can hold. What would you advise me to do before flashing. is my USb flash not working because my current BIOS has no errors?
@TTAV Yes, that was what I was referring to What do you mean by proper request? I do not want to substitute one HW ID for another, I wanted to have the whitelist removed altogether. Is this what you had already done for the Edge13, Edge30, etc or did you just simply do a HW ID swap?