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you have to read your bios chipset and post it here, you have "Bios Guides ..." in this forum to learn how to do it....
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you have to provide your MEC dump and serial no. There are 4 versions for this model....
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it can't be decrypted. Try this file, pass was deleted. Also try entering 3 random passwords with your original bios, see if you get a disable code....
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if doesn't turn on it means either you didn't solder chipsets properly or you didn't make good backups of bios chipsets....
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not that accurate, those files work only for V75 family bios, there are also 640 G10 with V74 family bios, so check 1st what family bios you have....
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use HP BCU to read DMI with original bios. (you'll find videos on youtube or guide here in this forum). Write the file I provided and at 1st boot enter bios setup with F10 and in MAIN tab reset bios to factory defaults. After that use again BCU to write DMI back....
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I will try to explain how I remove passwords in Unowhy:
1. Open bios backup file with hex editor.
2. Search for text "AMITSE".
3. Copy hex values found under "AMITSESetup" entry into a text editor - sometimes there are 2 strings of [COLOR=#e74c3c]32bytes[/COLOR] each - see photos
4. Fill with "00" hex strings of 32bytes found under "AMITSESetup" entry
5. [COLOR=#e74c3c]Search for hex strings of 32bytes[/COLOR] copied in text editor -you'll find them in many places, sometimes in 5-6 places. Fill them with "00"...Last edited by volinakis; 04-10-2025, 09:45 AM.
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1st thing use BCU (BiosConfigUtility)with your original bios+EC to read your DMI, using cmd line "biosconfigutility /get:1.txt" -you'll need to write back your DMI.
write both chipsets with files I upload. At 1st boot enter in bios setup with F10 and in MAIN tab reset to factory defaults. Wait for 2-3 mins, laptop will restart few times with no image.
Use again BCU to read again DMI ( "biosconfigutility /get:2.txt"), open 2.txt and fill empty fields with values from 1.txt (Product Name, Serial Number, SKU, BuildID, Feature Byte, System Board CT Number, CirrusSmartAmpCalibrationData,...Last edited by volinakis; 04-08-2025, 12:39 AM.
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nope, that's connector for trackpad. you have to put the ribbon into keyboard connector, align with 1st pin. You have tutorials on youtube...
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