Question about HP Pavilion tx1000z Notebook
Guest, based on what you say you should remove the memory and hard drive and power on to see what happens. Without a hard drive attached the motherboard should still POST (Power On Self Test) and give a memory check or missing device error. If it doesn't post even after you have stripped it back then there is something amiss, possibly the BIOS, CMOS memory, or more likely your motherboard is goosed....
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Turn the laptop over and remove the battery pack.
From the bottom of the laptop, unscrew the plastic shells securing the slots for memory,
Bluetooth, hard drive and modem.
You may have to remove more than one screw for each shell. Keep all screws in a small container, away from the work area.
Remove the memory (RAM) modules, the hard drive and any optical drives (CD-ROM or DVD-ROM).
Press the clips on either end of the memory slot to raise the RAM module and detach by pulling it out. Work slowly and carefully, to prevent damage to RAM modules or the memory slot.
Do the same for all modules, if you have more than one.
Slide out the hard drive and optical drive. If the drives seem to be stuck, look for any screws you may have missed.
Turn the laptop over and insert a pointy tool under the thin strip at the top of the keyboard. Use the tool as a lever to pry the securing strip loose, while working with your finger to release latches along the length of the strip.
Remove the keyboard by undoing two screws securing it.
Raise the keyboard and disconnect its cables.
Close the laptop lid and turn it around, so that you are facing ports on the back.
Remove two screws from the metal plate around the ports.
Open the lid and remove a single screw securing the wireless card cover; the screw is under the keyboard, which you already removed.
Disconnect cables from the motherboard.
Access the board through the space created by removing the keyboard. Unplug the speaker cable from the motherboard by carefully pulling at its head.
Unscrew and remove Wi-Fi antennas, and detach the wireless card from the motherboard. Unplug thin, ribbon-like cables from the video card.
Detach the display assembly from the base of the laptop.
Loosen any attachments, and pull the casing toward you to detach the display assembly, including the LCD panel, from the base.
With the motherboard completely exposed, unscrew and remove the video card.
Undo two screws from either side of the hard drive housing and detach the drive.
Dismount the CPU heat sink and detach the fan cable from the motherboard by removing five screws.
You can now access the battery board with the CMOS battery attached to it.
Undo two screws to detach the battery board from the motherboard.
Disconnect two cables running from the battery board, and carefully raise the board to detach it.
Replace the CMOS battery by prying it open with a pointy tool. Insert a new battery and reassemble the laptop.
hope this helps
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Almost all motherboards contain a jumper that can clear all CMOS settings along with the BIOS password. The location of this jumper varies depending upon the motherboard brand. You should read your motherboard manual to check its location. If you don't have the manual then look for the jumpers near the CMOS battery. Most of the manufacturer label the jumper as CLR, CLEAR, CLEAR CMOS, etc.
When you find the jumper, look carefully. There will be 3 pins and the jumper will be joining the center pin to either left or right pin. What you need to do, is remove the jumper and join the center pin to the opposite pin. e.g. if the jumper joins center pin to left pin, then remove it and join center pin to right pin. Now wait for a few seconds and then again remove the jumper and join the center pin to left pin.
Make sure to turn the PC off before opening the cabinet and resetting the jumper
The most common way that most of us know on how to reset or clear the BIOS password is to physically remove the power from the computer by disconnecting the power plug and then removing a battery for 30 minutes from the motherboard. Another way is to reset the clear CMOS jumper on the motherboard itself. Both of the 2 methods mentioned works because most motherboards use a battery to sustain the BIOS/CMOS settings for the motherboards PROM chip. So by cutting off the battery power, the BIOS/CMOS settings will be erased.
Hope this helps
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