Dell OptiPlex 390 Support Question
Dell OptiPlex 390 Support Question
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Question posted by Cindlherpo on June 7th, 2014
Yellow Power Light On Dell Optiplex 390dt Won't Start
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Current Answers
Answer #1: Posted by freginold on June 13th, 2014 4:53 PM
freginold
Member since:
December 20th, 2011 Points: 23,253,885
Member since:
December 20th, 2011 Points: 23,253,885
Often when a desktop computer won't turn on, it's because one of two components has failed: either the power supply unit or the motherboard (assuming you've ruled out the power coming in from the wall or surge protector as the problem).
Power supplies are generally not terribly expensive, compared to other components. If you're not getting any power at all, the power supply is a likely culprit. It's a much cheaper option to try than the motherboard. If you have a voltmeter or a power supply tester, you can check the power supply to verify that it's not supplying any power.
The motherboard is expensive to replace, so if you think the motherboard is the problem (if you've tried the power supply or ruled it out as the problem) it might be cheaper to get a new computer than have the motherboard repaired or replaced.
You can find a breakdown of what the different LEDs mean on page 67 of the owner's manual.
Power supplies are generally not terribly expensive, compared to other components. If you're not getting any power at all, the power supply is a likely culprit. It's a much cheaper option to try than the motherboard. If you have a voltmeter or a power supply tester, you can check the power supply to verify that it's not supplying any power.
The motherboard is expensive to replace, so if you think the motherboard is the problem (if you've tried the power supply or ruled it out as the problem) it might be cheaper to get a new computer than have the motherboard repaired or replaced.
You can find a breakdown of what the different LEDs mean on page 67 of the owner's manual.
Related Dell OptiPlex 390 Manual Pages
User Manual - Page 1
...optical drive eject button 8. optical drive
7. Mini-Tower - Front And Back View
Figure 1. USB 2.0 connectors (2) 9. power-supply diagnostic button 12.
optical drive bay 3. headphone connector 4. power-supply diagnostic light 11. Dell Optiplex 390
Setup And Features Information
About Warnings
WARNING: A WARNING indicates a potential for property damage, personal injury, or death...
User Manual - Page 8
... does not start, indicates a problem with the system board. Drive activity light
Blue light - Back of the power system by pressing the power-supply diagnostic button. The power supply is functional. The power cable must be defective. If the LED does not light up, the power supply may be connected during this test.
8 Amber light -
Diagnostic lights
Four lights located on...
Technical Guide - Page 3
DELL™ OPTIPLEX™ 390 TECHNICAL GUIDEBOOK -FINAL
MINI TOWER COMPUTER (MT) VIEW
1
6
10
7
11
15
2
12
16
8 3
4
9
5
13
14
FRONT VIEW
BACK VIEW
1 Power Button, Power Light
6 Optical Drive (optional)
2 Optical Drive Bay (optional)
7 Optical Drive Eject Button
3 Microphone Connector 8 USB 2.0 Connectors (2)
4 Headphone Connector 9 Drive Activity Light
10 Power Supply ...
Technical Guide - Page 4
DELL™ OPTIPLEX™ 390 TECHNICAL GUIDEBOOK -FINAL
MT System Board Components
Number
Name
1
Front IO connector (FRONTPANEL))
...16x Connector (SLOT1) System fan Connector (FAN_SYS2) P2 Power Connector(ATX12V) CPU Socket Connector (U27CPU) CPU fan Connector (FAN_CPU) Memory Connector(DIMM1) P1 power Connector (ATX) Power Switch Connector (PWRSW1) Memory Connector(DIMM2) Battery Connector...
Technical Guide - Page 5
DELL™ OPTIPLEX™ 390 TECHNICAL GUIDEBOOK -FINAL DESKTOP COMPUTER (DT) VIEW
1
2
3
9 10
11
4 56 7 8
12
13
14 15
FRONT VIEW 1 Optical Drive
BACK VIEW 5 Microphone Connector 9 Padlock Ring
13 Expansion Card Slots(4)
2 Optical Drive Eject Button 6 Headphone Connector 10 Security Cable Slot
3 Power Button, Power Light
4 USB Connectors (2)
7 Drive Activity Light 8 Diagnostic ...
Technical Guide - Page 6
DELL™ OPTIPLEX™ 390 TECHNICAL GUIDEBOOK -FINAL
DT System Board Components
Number
Name
1
Front IO connector (FRONTPANEL))
...16x Connector (SLOT1) System fan Connector (FAN_SYS2) P2 Power Connector(ATX12V) CPU Socket Connector (U27CPU) CPU fan Connector (FAN_CPU) Memory Connector(DIMM1) P1 power Connector (ATX) Power Switch Connector (PWRSW1) Memory Connector(DIMM2) Battery Connector...
Technical Guide - Page 7
DELL™ OPTIPLEX™ 390 TECHNICAL GUIDEBOOK -FINAL SMALL FORM FACTOR COMPUTER (SFF) VIEW
1
2
3
9
10
11 12 13
4 56
7 8
14
15
FRONT VIEW
1 Optical Drive
5 Microphone Connector
2 Optical Drive Eject Button 6 Headphone Connector
3 Power Button, Power Light
4 USB 2.0 Connectors (2)
7 Diagnostic Lights (4) 8 Drive Activity Light
BACK VIEW 9 Padlock Ring
10 Security Cable Slot 11...
Technical Guide - Page 18
...
17.8A
17.8A
17A
17A
+5.0v auxiliary output -12.0v output Max total 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™ 390 TECHNICAL GUIDEBOOK -FINAL POWER
NOTE: These form factors utilize a more than one 12v rail)
BTUs/h (based on...
Technical Guide - Page 19
... to 2.0V EndVoltage. 20℃±2℃.940Hrs. or Longer.910Hrs.or Longer after 12 months.
19 DELL™ OPTIPLEX™ 390 TECHNICAL GUIDEBOOK -FINAL POWER
NOTE: These form factors utilize a more efficient Active Power Factor Correction (APFC) power supply. If you have questions, please contact the manufacture to confirm the output type.
3.0v CMOS battery...
Technical Guide - Page 20
... Mbps
PCIe-based interface for S0 state, SMBus for Sx low power state N/A N/A 448.8mW (Max.) 389.4mW (Max.) 802.3 N/A
EEPROM (located in SPI)
10 Mb (full/half-duplex) 100 Mb (full/half-duplex)
1000 Mb (full-duplex)
20 DELL™ OPTIPLEX™ 390 TECHNICAL GUIDEBOOK -FINAL
AUDIO
INTEGRATED CONEXANT CX20641 HIGH DEFINITION AUDIO...
Technical Guide - Page 21
... This term does not connote an actual operating speed of 1 Gb/sec. DELL™ OPTIPLEX™ 390 TECHNICAL GUIDEBOOK -FINAL COMMUNICATIONS -
NETWORK ADAPTER (NIC) (CONT.)
INTEGRATED REALTEK®... 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...
Technical Guide - Page 23
... Ports Power Consumption Connector Full height USB3.0 add-in card Half height USB3.0 add-in card OS Support
MT
DT
SFF
PCI Express Gen. 2.0 X1
PCI Express one lane (x1) NEC µPD720200 2 * USB3.0 port Under 30 mA USB 3.0 A Type
Optional Optional
Win XP, Win Vista and Win 7 23 DELL™ OPTIPLEX™ 390...
Technical Guide - Page 25
...Note: Analog and/or digital)
External Connectors HDMI Bus Type Maximum supported resolution Maximum power consumption Audio Support External connectors
MT
DT
SFF
Integrated Gen6 Core Intel® HD ...in DOS. Intel HD Graphics [with Celeron/Pentium class CPU-GPU combo] 2. DELL™ OPTIPLEX™ 390 TECHNICAL GUIDEBOOK -FINAL
GRAPHICS/VIDEO CONTROLLER
NOTE: MT supports full height (FH) cards ...
Technical Guide - Page 26
DELL™ OPTIPLEX™ 390 TECHNICAL GUIDEBOOK -FINAL
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 ...
Technical Guide - Page 27
... preloaded material and operating environment and will be less.
27 DELL™ OPTIPLEX™ 390 TECHNICAL GUIDEBOOK -FINAL HARD DRIVES1
3.5" 1TB 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...
Technical Guide - Page 28
... material and operating environment and will be less.
28 DELL™ OPTIPLEX™ 390 TECHNICAL GUIDEBOOK -FINAL HARD DRIVES1 (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 only) Spin Up Current (reference only...
Technical Guide - Page 29
... material and operating environment and will be less.
29 DELL™ OPTIPLEX™ 390 TECHNICAL GUIDEBOOK -FINAL HARD DRIVES1 (CONT.)
3.5" 320GB 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...
Technical Guide - Page 30
DELL™ OPTIPLEX™ 390 TECHNICAL GUIDEBOOK -FINAL HARD DRIVES1 (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 Guide - Page 31
... size Access Times (typical) Maximum Data Transfer Rates Writes Reads Power Source DC Power Requirements
SATA 1.5Gbit/s Standard
supplier dependent supplier dependent
16x DVD/... Dimensions inches/ centimeters (Without Bezel - RW1
External Dimensions inches/ centimeters (Without Bezel - DELL™ OPTIPLEX™ 390 TECHNICAL GUIDEBOOK -FINAL
OPTICAL DRIVES
DVD +/- W x H x D)
MT
148.2mm(6in...
Technical Guide - Page 33
DELL™ OPTIPLEX™ 390 TECHNICAL GUIDEBOOK -FINAL
MEDIA CARD READER (MCR) NOTE: Dell 19 in 1 Media Card Reader (MCR) is not ...PRO) Specification 1.02
Memory Stick (MS) Specification 1.43 xD Specification 1.2
Power Source
Max Power Requirements
2.5W
Supply Voltage Range
4.75V ~ 5.25V
Power Consumption: Environmental Operating Conditions (Non-Condensing):
Standby less than 0.5mA @ ...
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