Dell OptiPlex 780 Support Question
Dell OptiPlex 780 Support Question
Find answers below for this question about Dell OptiPlex 780.Need a Dell OptiPlex 780 manual? We have 6 online manuals for this item!
Question posted by taylorh on January 15th, 2014
Dell Optiplex 780
I replace a new main board & processor and when I switched the PC on it is giving me this message "air temperature sensor not detected". I did check the fan connector number of time but the message keeps on appearing..
Current Answers
Answer #1: Posted by DellJesse1 on January 16th, 2014 8:01 AM
DellJesse1
Member since:
April 19th, 2012 Points: 1,551,500
Member since:
April 19th, 2012 Points: 1,551,500
taylorh,
You will need to re-attach the theremal diode cable. Click the link below to download the online users manual.
Optiplex 780 Online Users Manual
- Power off the system and unplug AC power.
- Hold down the power button for 10 seconds to drain residual power.
- Remove the system cover.
- Locate the thermal diode power cable connectors on the I/O panel and the system board
Note: For information about how to open the chassis and remove, reseat, and replace components, please refer to your Online User's Guide and browse to the Replacing and Removing Parts section. - Reseat the thermal diode power cable.
- Ensure that the thermal diode power cable is firmly seated in the connector on the motherboard and the input/output (I/O) panel. The cable is needed to power the thermal diode located on the I/O panel.
- Replace the system cover and power on the computer.
Thank You,
Dell-Jesse1
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Related Dell OptiPlex 780 Manual Pages
Setup and Features Information Tech Sheet (Desktop, Mini-Tower, Small Form Factor) - Page 1
Dell™ OptiPlex™ 780 Setup and Features Information Tech Sheet
Front and Back View - About Warnings
WARNING: A WARNING indicates a potential for property damage, personal injury, or death. Desktop
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1 optical drive 3 USB 2.0 connectors (2) 5 power button, power light 7 network connectivity light 9 headphone connector
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Service Manual - Page 1
...® Windows® operating systems are trademarks of Intel Corporation in the U.S. and other countries; October 2012 Rev. Dell™ OptiPlex™ 780 Service Manual
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Working on Your Computer Removing and Replacing Parts Specifications Diagnostics System Setup
Notes, Cautions, and Warnings
NOTE: A NOTE indicates important information that helps you purchased...
Service Manual - Page 3
...connector on the back of the computer. Damage due to dissipate static electricity, which could harm internal components. Hold a component such as a processor...connectors apart, keep them evenly aligned to ground the system board....
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Back to Contents Page
Removing and Replacing Parts
Dell™ OptiPlex™ 780 Service Manual-Desktop
Cover Primary Hard Drive Floppy Drive (Optional) Expansion Card Memory Power Supply Fan System Board
Optical Drive Secondary Hard Drive (Optional) Riser Cage Standard Back Plate Heat Sink and Processor Coin-Cell Battery IO Panel
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Service Manual - Page 12
... for one time only.
Enter system setup (see the Microsoft® Windows® desktop. If you wait too long and the operating system logo appears, continue to wait until you want to test displays in the system setup program. 3. When the Dell Diagnostics Main Menu appears, select the test that you see a message stating that...
Service Manual - Page 17
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Dell™ OptiPlex™ 780 Service Manual-Mini-Tower, Desktop...
Service Manual - Page 22
... Working Inside Your Computer. 2. Removing the Cover
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... the hard-drive data cable.
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Primary Hard Drive
Dell™ OptiPlex™ 780 Service Manual-Desktop
WARNING: Before working inside your computer, read the safety information that shipped with your computer. Remove the optical drive...
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... cable.
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Floppy Drive
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WARNING: Before working inside your computer, read the safety information that shipped with your...
Service Manual - Page 32
... and then ease the card up and out of its connector on the card-retention latch upwards. 3. For additional safety best practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance. Back to Contents Page
Expansion Card(s)
Dell™ OptiPlex™ 780 Service Manual-Desktop
WARNING: Before working inside your computer, read the safety...
Service Manual - Page 34
... the memory module out of the memory module connector.
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Memory
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...; OptiPlex™ 780 Service Manual-Desktop
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Remove the hard drive. 5. Disconnect the main power connector from the system board. Removing the Power Supply
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Service Manual - Page 42
... best practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance. Follow the procedures in Before Working Inside Your Computer. 2.
Pull out the fan retention tab, and then shift the fan towards the system board. Back to Contents Page
Fan
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Service Manual - Page 45
...-drive data cable from the system board.
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System Board
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Optical Drive
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WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Disconnect the optical-drive data cable.
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... the hard-drive data cable. For additional safety best practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance. Back to Contents Page
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Service Manual - Page 63
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Riser Cage
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WARNING: Before working inside your computer, read the safety information that shipped with your computer. Back to an upright position. Removing the Riser Cage
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... Black Plate
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Standard Back Plate
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WARNING: Before working inside your computer, read the safety information that shipped with your computer.
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... additional safety best practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
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Heat Sink and Processor
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Removing the Coin-Cell Battery
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Coin-Cell Battery
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