Dell OptiPlex 790 Support Question
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Question posted by Anandtjamil on December 10th, 2013
Optiplex 790 Won't Power Up 3 Light On
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Related Dell OptiPlex 790 Manual Pages
View - Page 1
![](/manualimages/s/h/dell-optiplex-790-view-e008870_1_0a34.png)
![](/manualimages/s/h/dell-optiplex-790-view-e008870_1_0a34.png)
...Front And Back View Of Mini-Tower
1. Dell OptiPlex 790
Setup And Features Information
About Warnings
WARNING: A WARNING indicates a potential for property damage, personal injury, or death. Mini-Tower - power supply diagnostic button 12. USB 2.0 connectors (4)
9. security-cable slot 16. power button, power light 2. optical-drive eject button 8. padlock ring
Regulatory Model...
View - Page 10
![](/manualimages/s/h/dell-optiplex-790-view-e008870_10_deb2.png)
![](/manualimages/s/h/dell-optiplex-790-view-e008870_10_deb2.png)
blinking blue light indicates sleep state of the
computer.
Power Coin-cell battery Voltage
Mini-Tower Desktop Small Form Factor
Ultra Small Form Factor Wattage
Mini-Tower Desktop
3 V CR2032 lithium coin cell
100 VAC to 240 VAC, 50 Hz to 60 Hz, 5.00 A 100 VAC to 240 VAC, 50 Hz to 60 Hz, 4....
Technical Guidebook - Page 3
![](/manualimages/d/7/dell-optiplex-790-technical-guidebook-9ed8fe1_3_ee0f.png)
![](/manualimages/d/7/dell-optiplex-790-technical-guidebook-9ed8fe1_3_ee0f.png)
DELL™ OPTIPLEX™ 790 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 (optional) 7 Optical Drive Eject Button 8 USB 2.0 Connectors (4) 9 Drive Activity Light
BACK VIEW
10 Power Supply Diagnostic Light
11 Power Supply ...
Technical Guidebook - Page 5
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![](/manualimages/d/7/dell-optiplex-790-technical-guidebook-9ed8fe1_5_b86c.png)
...
14 Power Supply Diagnostic Light
15 Power Supply Diagnostic Button
BACK PANEL CONNECTORS
1 Mouse Connector
7 Keyboard Connector
2 Link Integrity Light
8 USB Connectors (6)
3 Network Connector
9 Display Port Connector
4 Network Activity Light 10 VGA Connector
5 Serial connector 6 Line-out Connector
11 Line-in/Microphone connector
5 DELL™ OPTIPLEX™ 790 TECHNICAL GUIDEBOOK...
Technical Guidebook - Page 6
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...)
19 CPU fan connector(FAN_CPU)
8
LPC debug connector(LPC_DEBUG)
20 Memory connectors(DIMM1, DIMM2, DIMM3, DIMM4)
9
Intrusion switch connector (INTRUDER) 21 Power switch connector(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 DELL™ OPTIPLEX™ 790 TECHNICAL GUIDEBOOK -
Technical Guidebook - Page 7
![](/manualimages/d/7/dell-optiplex-790-technical-guidebook-9ed8fe1_7_5218.png)
![](/manualimages/d/7/dell-optiplex-790-technical-guidebook-9ed8fe1_7_5218.png)
...DELL™ OPTIPLEX™ 790 TECHNICAL GUIDEBOOK - V 1.6 SMALL FORM FACTOR COMPUTER (SFF) VIEW
FRONT VIEW
1 Optical Drive 2 Optical Drive Eject Button
5 Microphone Connector 6 Headphone Connector
3 Power Button, Power Light
4 USB 2.0 Connectors (4)
7 Diagnostic Lights (4) 8 Drive Activity Light
BACK VIEW 9 Padlock Ring
10 Security cable slot 11 Power Connector
13 Power Supply Diagnostic...
Technical Guidebook - Page 8
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![](/manualimages/d/7/dell-optiplex-790-technical-guidebook-9ed8fe1_8_0caa.png)
...Number
Name
1 P1 power connector(POWER)
12 LPC debug connector(LPC_DEBUG)
2 System fan connector(FAN_HDD)
13 Battery connector(BATTERY)
3 Internal speaker connector(INT_SPKR)
14 P2 power connector(12V_PWRCONN)
4 ...connector(SLOT2)
16 CPU fan connector(FAN_CPU)
6 PCI-e 16x connector(SLOT1)
17 Power switch connector(PWR_SW)
7 SATA 2 connector(SATA2)
18 Memory connector(DIMM3)
8 SATA...
Technical Guidebook - Page 9
![](/manualimages/d/7/dell-optiplex-790-technical-guidebook-9ed8fe1_9_cc49.png)
![](/manualimages/d/7/dell-optiplex-790-technical-guidebook-9ed8fe1_9_cc49.png)
... Antenna (optional)
10 Network Activity Light 11 Captive Thumbscrew 12 Padlock Ring 13 Security Cable Slot 14 Power Connector 15 Line-Out Connector
16 Line-in/ Microphone Connector
17 Display Port Connector 18 VGA Connector 19 Serial Connector
20 USB Connectors (5) 21 Network Connector 22 Link Integrity Light
9 DELL™ OPTIPLEX™ 790 TECHNICAL GUIDEBOOK -
Technical Guidebook - Page 21
![](/manualimages/d/7/dell-optiplex-790-technical-guidebook-9ed8fe1_21_1a5e.png)
![](/manualimages/d/7/dell-optiplex-790-technical-guidebook-9ed8fe1_21_1a5e.png)
...6.0
A Note: +12VB Rated at 0.4A when in Standby Mode. Power Supply Wattage
AC input Voltage Range AC input current (low ac range/...power Max combined +3.3v / +5.0v power Max combined 12.0v power (note: only if more efficient Active Power Factor Correction (APFC) power supply.
DELL™ OPTIPLEX™ 790 TECHNICAL GUIDEBOOK - If you have questions, please contact the manu- V 1.6
POWER...
Technical Guidebook - Page 22
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![](/manualimages/d/7/dell-optiplex-790-technical-guidebook-9ed8fe1_22_fdf4.png)
... form factors utilize a more efficient Active Power Factor Correction (APFC) power supply. Continuous Discharge Under 15 kΩ Load to 2.5V EndVoltage. 20℃...970Hrs.or Longer after 12 months. or Longer.890Hrs.or Longer after 12 months.
22 Dell recommends only Universal Power Supplies (UPS) based on Sine Wave output for APFC PSUs, not an approximation of a Sine Wave, Square Wave,...
Technical Guidebook - Page 23
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...
Integrated memory Data transfer mode (example Bus-Master DMA) Power consumption (full operation per data rate connection speed) Power consumption (standby operation) IEEE standards compliance (example 802.1P...COMMUNICATIONS - SFF supports low profile card.
DELL™ OPTIPLEX™ 790 TECHNICAL GUIDEBOOK - NETWORK ADAPTER (NIC)
NOTE: MT supports full height card, DT supports low profile ...
Technical Guidebook - Page 24
![](/manualimages/d/7/dell-optiplex-790-technical-guidebook-9ed8fe1_24_833f.png)
![](/manualimages/d/7/dell-optiplex-790-technical-guidebook-9ed8fe1_24_833f.png)
...memory
Data transfer mode (example Bus-Master DMA)
Power consumption (full operation per data rate connection speed)
Power consumption (standby operation) IEEE standards compliance (example ... an actual operating speed of 1 Gb/sec.
V 1.6 COMMUNICATIONS -
DELL™ OPTIPLEX™ 790 TECHNICAL GUIDEBOOK - NETWORK ADAPTER (NIC) (CONT.)
INTEGRATED INTEL® 82579 GIGABIT1 ETHERNET...
Technical Guidebook - Page 26
![](/manualimages/d/7/dell-optiplex-790-technical-guidebook-9ed8fe1_26_a826.png)
![](/manualimages/d/7/dell-optiplex-790-technical-guidebook-9ed8fe1_26_a826.png)
...USB 3.0 PORT PCIE ADD-IN CARD Connector Type Controller Details Controller bus architecture (example PCIe 1.0a x1) Chipset IO Ports Power Consumption Connector Full height USB3.0 add-in card Half height USB3.0 add-in card OS Support
MT
DT
SFF
USFF
PCI ... port Under 30 mA USB 3.0 A Type
Optional Optional
Win XP, Win Vista and Win 7 26 DELL™ OPTIPLEX™ 790 TECHNICAL GUIDEBOOK -
Technical Guidebook - Page 28
![](/manualimages/d/7/dell-optiplex-790-technical-guidebook-9ed8fe1_28_9444.png)
![](/manualimages/d/7/dell-optiplex-790-technical-guidebook-9ed8fe1_28_9444.png)
DELL™ OPTIPLEX™ 790 TECHNICAL GUIDEBOOK -
Onboard Graphics. 1. Intel HD Graphics 2000 [with ...2048x1536 @ 75Hz (VGA only)
VGA, DisplayPort
DisplayPort
Bus Type
DDPC
Maximum supported resolution
Up to 2560x1600 @ 60Hz
Maximum power consumption
N/A
External connectors
DisplayPort
DisplayPort Audio Support
Yes
1 Up to 1.7GB with Celeron/Pentium class CPU-GPU combo] 2....
Technical Guidebook - Page 29
![](/manualimages/d/7/dell-optiplex-790-technical-guidebook-9ed8fe1_29_7857.png)
![](/manualimages/d/7/dell-optiplex-790-technical-guidebook-9ed8fe1_29_7857.png)
...OPTIPLEX™ 790 TECHNICAL GUIDEBOOK - V 1.6
GRAPHICS/VIDEO CONTROLLER (CONT.)
1GB AMD RADEON™ HD6450 Bus Type (example integrated or PCIe x16) GPU core clock Frame Buffer Memory (onboard and shared) Size and Speed Maximum power... Frame Buffer Memory (onboard and shared) Size and Speed Maximum power consumption Overlay Planes Maximum Color Depth Maximum Vertical Refresh Rate Multiple ...
Technical Guidebook - Page 30
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![](/manualimages/d/7/dell-optiplex-790-technical-guidebook-9ed8fe1_30_2f45.png)
...inches (W x D x H) Interface type and Maximum speed Internal buffer size Average Seek Time Rotational Speed Logical Blocks Power Source Power Consumption (reference only) Spin Up Current (reference only) Environmental Operating Conditions (Non-Condensing): Temperature Range Relative Humidity ... ft
1 For hard drives, GB means 1 billion bytes ; DELL™ OPTIPLEX™ 790 TECHNICAL GUIDEBOOK -
Technical Guidebook - Page 31
![](/manualimages/d/7/dell-optiplex-790-technical-guidebook-9ed8fe1_31_ae02.png)
![](/manualimages/d/7/dell-optiplex-790-technical-guidebook-9ed8fe1_31_ae02.png)
DELL™ OPTIPLEX™ 790 TECHNICAL GUIDEBOOK - actual capacity varies with preloaded material and operating environment and will be less.
31 V 1.6 HARD DRIVES (CONT.)
3.5" 500GB SATA 7200 RPM HDD Capacity (bytes) Dimensions inches (W x D x H) Interface type and Maximum speed Internal buffer size Average Seek Time Rotational Speed Logical Blocks Power Source Power Consumption (reference ...
Technical Guidebook - Page 32
![](/manualimages/d/7/dell-optiplex-790-technical-guidebook-9ed8fe1_32_86be.png)
![](/manualimages/d/7/dell-optiplex-790-technical-guidebook-9ed8fe1_32_86be.png)
...(W x D x H) Interface type and Maximum speed Internal buffer size Average Seek Time Rotational Speed Logical Blocks Power Source Power Consumption (reference only) Spin Up Current (reference only) Environmental Operating Conditions (Non-Condensing): Temperature Range Relative Humidity...material and operating environment and will be less.
32 DELL™ OPTIPLEX™ 790 TECHNICAL GUIDEBOOK -
Technical Guidebook - Page 33
![](/manualimages/d/7/dell-optiplex-790-technical-guidebook-9ed8fe1_33_aa58.png)
![](/manualimages/d/7/dell-optiplex-790-technical-guidebook-9ed8fe1_33_aa58.png)
DELL™ OPTIPLEX™ 790 TECHNICAL GUIDEBOOK - V 1.6 HARD DRIVES(CONT.)
3.5" 250GB SATA 7200 RPM HDD Capacity (bytes) Dimensions inches (W x D x H) Interface type and Maximum speed Internal buffer size Average Seek Time Rotational Speed Logical Blocks Power Source Power Consumption (reference only) Spin Up Current (reference only) Environmental Operating Conditions (Non-Condensing): ...
Technical Guidebook - Page 35
![](/manualimages/d/7/dell-optiplex-790-technical-guidebook-9ed8fe1_35_0b3c.png)
![](/manualimages/d/7/dell-optiplex-790-technical-guidebook-9ed8fe1_35_0b3c.png)
DELL™ OPTIPLEX™ 790 TECHNICAL GUIDEBOOK - actual capacity varies with preloaded material and operating environment and will be less.
35 V 1.6 HARD DRIVES (CONT.) 2.5" 500GB SATA 7200 RPM HYBRID HDD Capacity (bytes) Dimensions inches (W x D x H) Interface type and Maximum speed Internal buffer size Average Seek Time Rotational Speed Logical Blocks Power Source Power Consumption (...
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