mjs_mjs Posted May 7, 2011 Posted May 7, 2011 rite - i have a hp envy 15 laptop where the password on boot has been enabled by someone other than the owner. I cannot boot from anything. Has anyone got any ideas how i can get out of this predicament? many thanks for any and all suggestions
ihaveaproblem Posted May 7, 2011 Posted May 7, 2011 Can you find the jumper/dip switch on the laptop to reset the password using that method? Or remove the cmos battery for some time and then put it back. What bios does this laptop have? On some bios's you can get software to crack the password, however i've never used this method so i'm not sure how reliable it is.
plexer Posted May 7, 2011 Posted May 7, 2011 Most laptops do not have a switch like that or an accessible battery and even if they do the password could be in an eeprom chip. Ben
mjs_mjs Posted May 7, 2011 Author Posted May 7, 2011 Can you find the jumper/dip switch on the laptop to reset the password using that method? Or remove the cmos battery for some time and then put it back. What bios does this laptop have? On some bios's you can get software to crack the password, however i've never used this method so i'm not sure how reliable it is. thanks, urm ideally taking the thing apart to find a jumper/battery is the last resort. i can't crack the password as i can't boot into anything to run a crack from but good thinking on the cmos battery - will have a look in the service manuals now. thanks
Steve21 Posted May 7, 2011 Posted May 7, 2011 rite - i have a hp envy 15 laptop where the password on boot has been enabled by someone other than the owner. I cannot boot from anything. Has anyone got any ideas how i can get out of this predicament? many thanks for any and all suggestions Few options, If you're happy with the hardware, try removing CMOS battery to reset it. ( or jumpers ) Try to crack it using software like ibios. Find the manufacturer and try their standard backdoor bios passwords, that most machines have. Steve
mjs_mjs Posted May 7, 2011 Author Posted May 7, 2011 will removing the cmos battery should i find one simply reset the bios back to it's defaults? how likely is it to break the laptop (not that it's currently usable)?
Steve21 Posted May 7, 2011 Posted May 7, 2011 will removing the cmos battery should i find one simply reset the bios back to it's defaults? how likely is it to break the laptop (not that it's currently usable)? All it does is power the chip that remembers how the bios is configured, boot order etc. Thus if removed long enough defaults apply again (assuming you have no other hidden batteries etc) Steve
timbo343 Posted May 7, 2011 Posted May 7, 2011 Best of luck getting to the CMOS battery on a laptop. I know some can be a nightmare to get to. Toshiba on the other hand have 2 bits of solder that need touching together which reset the BIOS, cant believe a company wanted £50 to do this.... Madness
mjs_mjs Posted May 7, 2011 Author Posted May 7, 2011 hp envy 15, product no VY195EA#ABU, model 15-1110ea
plexer Posted May 7, 2011 Posted May 7, 2011 Page 48 of the service manual is real time clock batter removal: http://h10032.www1.hp.com/ctg/Manual/c02131229.pdf HP service manuals are very good for dismantling. Ben 1
mjs_mjs Posted May 7, 2011 Author Posted May 7, 2011 Page 48 of the service manual is real time clock batter removal: http://h10032.www1.hp.com/ctg/Manual/c02131229.pdf HP service manuals are very good for dismantling. Ben Many thanks - I'll give this a go. how long should one leave the battery disconnected for?
plexer Posted May 7, 2011 Posted May 7, 2011 5 - 10 minutes, make sure the system battery is out and the psu lead. You can also try pressing the power button whilst they are all unplugged sometimes helps to discharge things. Ben 1
sted Posted May 7, 2011 Posted May 7, 2011 there are cds out there that will do it and if you remove the hard drive that may change the boot order enough to boot from cd/usb
mjs_mjs Posted May 7, 2011 Author Posted May 7, 2011 big thanks to all but solution was; to remove RTC battery for 8 mins. CMOS reset to defaults and i'm in - cheers guys.
accura2000 Posted May 9, 2011 Posted May 9, 2011 Would these work for you? http://www.edugeek.net/forums/security/66256-laptop-bios-unlocking-utilities.html
plexer Posted May 9, 2011 Posted May 9, 2011 Thanks for the suggestion but as the OP has allready stated removing the rtc battery solved the issue. Ben
markcuk Posted May 9, 2011 Posted May 9, 2011 i would of used this site Dogbert's Blog: BIOS Password Backdoors in Laptops
plexer Posted May 9, 2011 Posted May 9, 2011 Yes another possbility and I was looking at that over the weekend as well. Ben
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now