Dell OptiPlex SX280 Bedienungs- und Sicherheitshinweise

Replacing Dell Optiplex SX280 Motherboard

Tools used in this guide

Phillips #2 Screwdriver (1)

Remove the Motherboard from the computer.

Replacing Dell Optiplex SX280 Motherboard

© 2010 iFixit — CC BY-NC-SA www.iFixit.com Page 1 of 17

Step 1 - disassembly Panel Cover

Make sure the computer is turned off, by

selecting the start menu and choosing “Shut Do

wn”.

Ensure all cables, speakers and other

devices are unplugged and turned off before

opening the computer case.

Step 2

Lay the computer on its side; you will see a blue knob.

Turn this knob 90 deg clockwise.

Replacing Dell Optiplex SX280 Motherboard

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Step 3

Slide the panel case forward about 1/2 inch while knob

is turned.

Lift panel case off computer.

Step 4 - Heat Sink

Remove the large blue cover from the computer, there

are no screws or tabs keeping it in place.

Replacing Dell Optiplex SX280 Motherboard

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Step 5

Press down on the release tab above the heat sink.

Step 6

Pull the heat sink out of the computer while pressing on

the release tab.

Replacing Dell Optiplex SX280 Motherboard

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Step 7 - Upper Fan

Remove the power supply that connects the upper fan

to the motherboard. The power supply has black, red,

green and yellow wires.

Step 8

Remove the rubber grommets from the base of the fan.

A spudger may be useful.

Replacing Dell Optiplex SX280 Motherboard

© 2010 iFixit — CC BY-NC-SA www.iFixit.com Page 5 of 17

Step 9

Press on the blue release tab and pull the upper fan out

of the computer.

Step 10 - Lower Fan

Remove the power supply that connects the lower fan

to the motherboard, distinguished by it's black, red,

green and yellow wires.

Make sure to press on the release tab while

removing the power supply.

Replacing Dell Optiplex SX280 Motherboard

© 2010 iFixit — CC BY-NC-SA www.iFixit.com Page 6 of 17

Step 11

Remove the rubber grommets from the base of the fan.

A spudger may be useful.

Step 12

Press on the blue release tab and remove the fan.

Replacing Dell Optiplex SX280 Motherboard

© 2010 iFixit — CC BY-NC-SA www.iFixit.com Page 7 of 17

Step 13 - RAM

The RAM are the two green cards in the corner of the

computer.

At each end of the card, there are two white clips

securing the RAM to the Motherboard.

Step 14

Push down both white clips with your thumbs until you

hear a click.

The RAM cards can now be removed.

Replacing Dell Optiplex SX280 Motherboard

© 2010 iFixit — CC BY-NC-SA www.iFixit.com Page 8 of 17

Step 15 - Hard Drive

Unplug the blue cable that connects the hard drive to

the motherboard.

Step 16

Unplug the power supply, distinguished by its red and

yellow wires.

Replacing Dell Optiplex SX280 Motherboard

© 2010 iFixit — CC BY-NC-SA www.iFixit.com Page 9 of 17

Step 17

Squeeze the release tabs on either side of the hard

drive.

Then slide the hard drive out of the computer while

squeezing the tabs.

Step 18 - Motherboard

Unplug the cable that connects the hard drive to the

Motherboard.

Replacing Dell Optiplex SX280 Motherboard

© 2010 iFixit — CC BY-NC-SA www.iFixit.com Page 10 of 17

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3

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