Question about Pioneer DEH-P7800MP
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Posted on Jan 02, 2017
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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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