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Dell OptiPlex 790 Support Question

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Question posted by vheltelbma on July 22nd, 2014

Dell Optiplex 790 Won't Turn On And A Three Is On The Front

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Answer #1: Posted by DellJesse1 on July 22nd, 2014 4:53 AM
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DellJesse1

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vheltelbma,

The diagnostic led 3 showing could possibly mean a A possible system board failure has occurred. Try unplugging the computer. Allow one minute for the power to drain. Plug the computer into a working electrical outlet and press the power button. You can also reseat the processor as well.


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Related Dell OptiPlex 790 Manual Pages

View - Page 1

Front And Back View Figure 1. Front And Back View Of Mini-Tower 1. optical-drive bay (optional) 3. microphone connector 5. back panel connectors 14. Dell OptiPlex 790 Setup And Features Information About Warnings WARNING: A WARNING indicates a potential for property damage, personal injury, or death. power button, power light 2. diagnostic lights (4) 6. drive activity ...
Technical Guidebook - Page 3

DELLOPTIPLEX790 TECHNICAL GUIDEBOOK - V 1.6 MINI TOWER COMPUTER (MT) VIEW FRONT VIEW 1 Power Button, Power Light 2 Optical Drive Bay (optional) 3 Headphone Connector 4 Microphone Connector 5 Diagnostic Lights (4) 6 Optical Drive (...
Technical Guidebook - Page 5

DELLOPTIPLEX790 TECHNICAL GUIDEBOOK - V 1.6 DESKTOP COMPUTER (DT) VIEW FRONT VIEW 1 Optical Drive 2 Optical Drive Eject Button 3 Power Button, Power Light 4 USB Connectors (4) 5 Microphone Connector 6 Headphone Connector 7 Drive Activity Light 8 Diagnostic ...
Technical Guidebook - Page 6

V 1.6 DESKTOP COMPUTER (DT) VIEW Number Name Number Name 1 Internal speaker connector(INT_SPKR) 13 PCI connector(SLOT3) 2 Front IO connector(FRONTPANEL) 14 PCI-e 4x connector(SLOT4)...PWR_SW) 10 Buzzer(BEEP) 22 Battery connector(BATTERY) 11 PCI-e 16x connector(SLOT1) 23 P1 power connector(POWER) 12 PCI-e 1x connector(SLOT2) 6 DELLOPTIPLEX790 TECHNICAL GUIDEBOOK -
Technical Guidebook - Page 7

... connector 8 Display Port Connector 3 Link Integrity Light 9 VGA Connector 4 Network Connector 10 USB Connectors (6) 5 Network Activity Light 6 Line-out Connector 11 Line-in/Microphone connector 7 DELLOPTIPLEX790 TECHNICAL GUIDEBOOK -
Technical Guidebook - Page 8

DELLOPTIPLEX790 TECHNICAL GUIDEBOOK - V 1.6 SMALL FORM FACTOR COMPUTER (SFF) VIEW Number Name Number Name 1 P1 power connector(POWER) 12 LPC debug connector(LPC_DEBUG) 2 System fan connector(FAN_HDD) ...
Technical Guidebook - Page 9

DELLOPTIPLEX790 TECHNICAL GUIDEBOOK - V 1.6 ULTRA SMALL FORM FACTOR COMPUTER (USFF) VIEW FRONT VIEW 1 Optical Drive 2 Optical Drive Eject Button 3 Power Button, Power Light 4 Drive Activity Light 5 Diagnostic ...
Technical Guidebook - Page 11

...64 bit), Windows Vista® Ultimate SP2 (32 bit) Basic Driver support only via Dell.com FreeDOS for (N-series), Ubuntu® Linux version 10.10 (China only) Optional ... in select countries LOM configuration contained within SPI_FLASH - no dedicated LOM EEPROM 11 DELLOPTIPLEX790 TECHNICAL GUIDEBOOK - V 1.6 MARKETING SYSTEM CONFIGURATIONS NOTE: Offerings may vary by country...
Technical Guidebook - Page 12

... BRIDGE Q-0 3MB 2c FCLGA 2.6GHZ 65W HD GRAPHICS 2000 QS X X X X 12 Processor availability subject to Dell customers. NOTE: Processor numbers are not a measure of Dell's relationship products that are a subset of performance. DELLOPTIPLEX790 TECHNICAL GUIDEBOOK - V 1.6 PROCESSOR NOTE: Global Standard Products (GSP) are managed for purchase globally. The following GSP...
Technical Guidebook - Page 13

DELLOPTIPLEX790 TECHNICAL GUIDEBOOK - If the memory modules are not installed in matched pairs, the computer will be installed in performance. To fully utilize 4GB or more ...
Technical Guidebook - Page 14

DELLOPTIPLEX790 TECHNICAL GUIDEBOOK - V 1.6 DRIVES AND REMOVABLE STORAGE MT Bays: 5.25-inch bay (External Optical) 2 Hard Drives Supported (Internal and External) 2 Optical Drives Supported 2 Interface: SATA 2.0 3 SATA 3.0 1 3.5" ...
Technical Guidebook - Page 15

...STORAGE Optical Drive: (SFF/USFF require slim-line optical drive) DVD+/-RW2 DVD-ROM3 Media Card Reader: Dell 19 in 1 Media Card Reader MT SATA 1.5Gbit/s SATA 1.5Gbit/s X DT SATA 1.5Gbit/s ...SATA 1.5Gbit/s X SFF SATA 1.5Gbit/s SATA 1.5Gbit/s USFF SATA 1.5Gbit/s SATA 1.5Gbit/s NOTE: Dell 19 in card location and priority: PCI: 1394; PCIe x16: GFX, USB 3.0, Serial, Parallel/Serial, NIC,...
Technical Guidebook - Page 16

DELLOPTIPLEX790 TECHNICAL GUIDEBOOK - V 1.6 GRAPHICS/VIDEO CONTROLLER NOTE: MT supports full height card, DT supports low profile card. SFF supports low profile card. See chassis diagrams section ...
Technical Guidebook - Page 17

... Audio Speaker Dell AX210 2.0 Desktop Speakers Dell AX510/AX510PA Flat Panel Soundbar Speakers MT DT SFF USFF Integrated on system board Optional via add-in card USFF 1 This term does not connote an actual operating speed of 1 Gb/sec. DELLOPTIPLEX790 TECHNICAL GUIDEBOOK - COMMUNICATIONS - SFF supports low profile card. Intel® 82579LM Gigabit1...
Technical Guidebook - Page 18

... Internet Security McAfee 10 SecurityCenter MT DT SFF USFF Available via Dell.com Standard 30 Day Trial or Optional Subscription 30 Day Trial or Optional Subscription 18 only. DELLOPTIPLEX790 TECHNICAL GUIDEBOOK - V 1.6 SECURITY Trusted Platform Module (TPM) 1.21 Chassis Intrusion Switch Dell Smartcard Keyboard Chassis lock slot and loop support MT DT...
Technical Guidebook - Page 19

....2 3.65 / 9.26 2.56 / 6.5 Depth (inches/centimeters) Shipping Weight (pounds/kilograms - A typical configuration includes: integrated graphics, one hard drive, one optical drive, and one diskette drive. DELLOPTIPLEX790 TECHNICAL GUIDEBOOK -
Technical Guidebook - Page 20

DELLOPTIPLEX790 TECHNICAL GUIDEBOOK - V 1.6 SYSTEM LEVEL ENVIRONMENTAL AND OPERATING CONDITIONS Temperature Operating Non-Operating (Storage) Relative Humidity Maximum vibration Operating Non-Operating Maximum Shock MT DT SFF ...
Technical Guidebook - Page 21

... 0.1 A 200W N/A 200W 682 BTU N/A Yes Yes Yes Yes 21 If you have questions, please contact the manu- Dell recommends only Universal Power Supplies (UPS) based on PSU max wattage) 4.0A 0.5A 265W 90W 240W 904 BTU Power Supply ... 20 - 50 - 100% load N/A N/A N/A +12VA 12.5 A & +12VB - 6.0 A Note: +12VB Rated at 0.4A when in Standby Mode. DELLOPTIPLEX790 TECHNICAL GUIDEBOOK -
Technical Guidebook - Page 22

or Longer.890Hrs.or Longer after 12 months. DELLOPTIPLEX790 TECHNICAL GUIDEBOOK - or Longer.1133Hrs.or Longer after 12 months. 22 V 1.6 ... 3V Lithium Life Continuous Discharge Under 15 kΩ Load to 2.0V EndVoltage. 20℃±2℃.1000Hrs. Dell recommends only Universal Power Supplies (UPS) based on Sine Wave output for APFC PSUs, not an approximation of ...
Technical Guidebook - Page 23

...-duplex) 100 Mb (full/half-duplex) 1000 Mb (full-duplex) 23 NETWORK ADAPTER (NIC) NOTE: MT supports full height card, DT supports low profile card. DELLOPTIPLEX790 TECHNICAL GUIDEBOOK - SFF supports low profile card.

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