I change n600c's harddisk with wd scorpio blue 250GB,but only 131GB can be recognized.I used intel 48-bit lba test program to find n600c can't support large disk more than 137GB.I contact hp technical support but they did not seem to care.
It depends what you want to use the laptop for but Windows XP SP2 (Disk needs Service Pack integrated), Windows Fundamentals for Legacy PC's and Windows Vista and Windows 7 will correctly address a hard drive within a machine that has the 137gb 48bit LBA problem.
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Entering and Exiting the BIOS
Power on the system. Press F10 when the blinking cursor appears in the upper-right portion of the screen. Select a task from the following menus: File, Security, or Advanced.
To exit the Bios, select the File menu. Choose either Ignore changes and exit or Save changes and exit, and then press Enter. When you are prompted to confirm your choice, press F10
According to the detailed specs on that model, it came with a 60GB
ATA-5 EIDI hard drive. therefore, you can use any ATA compatible
(ATA-5, ATA-6 or ATA-100) EIDE/IDE drive that has jumpers enabling you
to configure the drive as "Master". Western Digital Blue Scorpio and
Seagate Momentus lines both have models that will fit the bill. You
can find those drives at your neighborhood BestBuy or Staples pretty
easily. I don't know if the A25 BIOS supports 48-bit
logical block addressing (LBA), in spite of what toshiba says, If it only supports 24-bit LBA the
maximum drive size is 137GB. If it supports 48-bit LBA then you can go
as high as you can find drives available; usually 500GB. I suspect that
it supports 48-bit LBA because various online vendors list up to 250GB
drives for that model. The most important thing about the drive,
though, is that it MUST be jumperable as 'master'. A cable select only
drive won't work. Both the Western Digital and Seagate EIDE models have
jumpers. hope this helps but if you need anything else just ask:)
You can remove your bios password by reseting your CMOS battery or jamper. You need to open your notebook remove first the battery and all screw
at the back of your notebook. You can see there a CMOS battery together
with the CMOS jamper. Just read it you can read CLRSCR which means
clear cmos, just pull it with in 10 seconds and insert it back. Now you
are done to reset bios.
using the blue Fn key(usually on bottom left to side of space bar)..look at Funtion keys on top, under the screen. One of them(F5 or F8) will have a blue sun image or a monitor image to increase or decrease the brightness. press the Fn key first, then the one that increases brightness until it's good .
I believe you hit F10 key to enter bios. Go to the advanced menu and select boot options. You can select in there what order the computer tries to boot from different options. You need to select boot from CD and put it in sequence before the hard drive. Most bios versions well give you a first, second, third boot device and so on. Set first device to CD rom, second to Hard drive 0, third to none unless you use a floppy drive to boot from (rare).