Dell Latitude 7210 2-in-1, Service Manual

Page: 86 / 89

For example, the power and battery-status light blinks amber two times followed by a pause, and then blinks white three times followed by
a pause. This 2,3 pattern continues until the computer is turned off indicating no memory or RAM is detected.
The following table shows different power and battery-status light patterns and associated problems.
Table 2. LED codes
Diagnostic light codes Problem description
2,1 Processor failure
2,2 System board: BIOS or ROM (Read-Only Memory) failure
2,3 No memory or RAM (Random-Access Memory) detected
2,4 Memory or RAM (Random-Access Memory) failure
2,5 Invalid memory installed
2,6 System-board or chipset error
2,7 Display failure
2,8 LCD power rail failure. Replace system board
3,1 Coin-cell battery failure
3,2 PCI, video card/chip failure
3,3 Recovery image not found
3,4 Recovery image found but invalid
3,5 Power-rail failure
3,6 System BIOS Flash incomplete
3,7 Management Engine (ME) error
Camera status light: Indicates whether the camera is in use.
• Solid white — Camera is in use.
• Off — Camera is not in use.
Caps Lock status light: Indicates whether Caps Lock is enabled or disabled.
• Solid white — Caps Lock enabled.
• Off — Caps Lock disabled.
Kickstand open status behavior
Table 3. Kickstand open status behavior
Operation Sequence Power status changes
1- Kickstand 2 - Folio KB S0 MS S4 **G3/S5
1 Closed to Open
W/O Folio KB
System
keeps
opened
System resume System resume System resume
2 Open to Closed
System
keeps
opened
System resume System off System off
3 Closed
Folio KB closed -> opened (Action)
System
keeps
opened
System resume System off System off
4 Open
System
keeps
opened
System resume System resume
System
resume***
86 Troubleshooting