Service Manual
Table Of Contents
- Precision 3660 Tower Service Manual
- Contents
- Working inside your computer
- Removing and installing components
- Recommended tools
- Screw list
- Major components of Precision 3660 Tower
- Side cover
- Front bezel
- 3.5 in. hard-drive assembly
- Removing the 3.5-inch hard-disk drive assembly (Bay-1)
- Removing the 3.5-inch hard-disk drive assembly (Bay-2)
- Removing the 3.5-inch hard-disk drive bracket
- Installing the 3.5-inch hard-disk drive bracket
- Installing the 3.5-inch hard-disk drive assembly (Bay-2)
- Installing the 3.5-inch hard-disk drive assembly (Bay-1)
- Solid-state drive
- WLAN card
- WLAN antenna
- Coin-cell battery
- Memory module
- GPU end holder
- Expansion card
- Power-supply unit
- Processor fan and heat-sink assembly
- Liquid cooler
- Processor
- Chassis fan
- Power button
- Intrusion switch
- Intrusion speaker
- System board
- Software
- System setup
- Troubleshooting
- Getting help and contacting Dell
Table 21. Diagnostic LED behavior (continued)
Blinking pattern
Problem description Suggested resolutionAmber White
● If problem persists,
replace the memory
module.
2 6 System board / Chipset
Error / Clock failure / Gate
A20 failure / Super I/O
failure / Keyboard controller
failure
● Flash latest BIOS version
● If problem persists,
replace the system board.
3 1 CMOS battery failure
● Reset the CMOS battery
connection.
● If problem persists,
replace the RTS battery.
3 2 PCI or Video card/chip failure
Replace the system board.
3 3 BIOS Recovery image not
found
● Flash latest BIOS version
● If problem persists,
replace the system board.
3 4 BIOS Recovery image found
but invalid
● Flash latest BIOS version
● If problem persists,
replace the system board.
3 5 Power rail failure
● EC ran into power
sequencing failure.
● If problem persists,
replace the system board.
3 6 SBIOS Flash corruption
● Flash corruption detected
by SBIOS
● If problem persists,
replace the system board.
3 7 Intel ME (Management
Engine) Error
● Timeout waiting on ME to
reply to HECI message
● If problem persists,
replace the system board.
4 2 CPU Power Cable Connection
Issue
Recovering the operating system
When your computer is unable to boot to the operating system even after repeated attempts, it automatically starts Dell
SupportAssist OS Recovery.
Dell SupportAssist OS Recovery is a standalone tool that is preinstalled in all Dell computers installed with Windows operating
system. It consists of tools to diagnose and troubleshoot issues that may occur before your computer boots to the operating
system. It enables you to diagnose hardware issues, repair your computer, back up your files, or restore your computer to its
factory state.
You can also download it from the Dell Support website to troubleshoot and fix your computer when it fails to boot into their
primary operating system due to software or hardware failures.
For more information about the Dell SupportAssist OS Recovery, see Dell SupportAssist OS Recovery User's Guide at
www.dell.com/serviceabilitytools. Click SupportAssist and then, click SupportAssist OS Recovery.
Troubleshooting
91