- Notes, cautions, and warnings
- Working on your computer
- Removing and installing components
- Recommended tools
- Screw size list
- Subscriber identification module card
- Base cover
- Battery
- Solid state drive
- Speaker
- Coin cell battery
- WWAN card
- WLAN card
- Memory modules
- Heat sink
- LED board
- Touchpad buttons board
- Power connector port
- Display Assembly
- Touch display panel
- Display Bezel
- Nontouch display panel
- Camera Microphone Module
- Display Hinge Caps
- System board
- Keyboard
- Palm rest
- Technology and components
- System specifications
- System setup
- BIOS overview
- Entering BIOS setup program
- Navigation keys
- One time boot menu
- System setup options
- General screen options
- System Configuration screen options
- Video screen options
- Security screen options
- Secure Boot screen options
- Intel software guard extensions screen options
- Performance screen options
- Power management screen options
- POST behavior screen options
- Manageability
- Virtualization support screen options
- Wireless screen options
- Maintenance screen options
- System logs screen options
- Admin and System password
- Updating the BIOS
- System and setup password
- Clearing CMOS settings
- Clearing BIOS (System Setup) and System passwords
- Software
- Troubleshooting
- Contacting Dell
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Latitude 7290 Owner's Manual
Diagnostic LED
This section details the diagnostic features of the battery LED in a notebook.
Instead of beep codes errors are indicated via the bicolor Battery
Charge LED. A specific blink pattern is followed by flashing a
pattern of flashes in amber, followed by white. The pattern then
repeats.
NOTE The diagnostic pattern will consist of a two digit number being
represented by a first group of LED blinks (1 through 9) in amber,
followed by a 1.5 second pause with the LED off, and then a second
group of LED blinks (1 through 9) in white. This is then followed
by a three second pause, with the LED off, before repeating over
again. Each LED blink takes 0.5 seconds.
The system will not shutdown when displaying the Diagnostic Error Codes. Diagnostic Error Codes will always supersede any other use of the LED. For instance, on Notebooks, battery codes for Low Battery or Battery Failure situations will not be displayed when Diagnostic Error Codes are being displayed:
| Blinking pattern | Problem Description | Suggested Resolution | |
|---|---|---|---|
| Amber | White | ||
| 2 | 1 | processor | processor failure |
| 2 | 2 | system board, BIOS ROM | system board, covers BIOS corruption or ROM error |
| 2 | 3 | memory | no memory/no RAM detected |
| 2 | 4 | memory | memory failure/RAM failure |
| 2 | 5 | memory | invalid memory installed |
| 2 | 6 | system board; chipset | system board/ chipset error |
| 2 | 7 | display | display failure |
| 3 | 1 | RTC power failure | coin-cell battery failure |
| 3 | 2 | PCI/Video | PCI/Video card/chip failure |
| 3 | 3 | BIOS recovery 1 | recovery image nor found |
| 3 | 4 | BIOS recovery 2 | recovery image found but invalid |
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