Real-Time Clock (Rtc Reset); Recovering The Operating System - Dell Latitude 7230 Service Manual

Table 23. System-diagnostic lights (continued)
Blinking pattern
Amber
3
3
4
4
NOTE: Blinking 3-3-3 LEDs on Lock LED (Caps-Lock or Nums-Lock), Power button LED (without Fingerprint reader), and
Diagnostic LED indicates failure to provide input during LCD panel test on Dell SupportAssist Pre-boot System Performance
Check diagnostics.
RJ45 LEDs
The Latitude 7230 Rugged Extreme Tablet RJ45 port has double-LEDs on the either side.
● 10 Mbps—Green
● 100 Mbps—Orange
● 1 Gbps—Green + Orange
● Ethernet activity indicator = Yellow flashing

Real-Time Clock (RTC Reset)

The Real Time Clock (RTC) reset function allows you or the service technician to recover Dell systems from No POST/No
Power/No Boot situations. The legacy jumper enabled RTC reset has been retired on these models.
Start the RTC reset with the system powered off and connected to AC power. Press and hold the power button for
thirty (30) seconds
. The system RTC Reset occurs after you release the power button.

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.
Green Problem description
6 Flash corruption detected by
7 Timeout waiting on ME to
reply to HECI message.
1 Memory DIMM power rail
2 CPU Power Cable Connection
Suggested resolution
●
SBIOS.
●
source (AC, battery, coin
cell) and drain flea power
● Run "BIOS recovery from
USB", and the instructions
●
replace the system board.
Replace the system board.
failure
Issue
Press power button for
over 25 seconds to do
RTC reset. If problem
persists, replace the
system board.
Disconnect all power
by pressing and holding
down power button 3~5
seconds to ensure all
power are drained.
are in the website Dell
support.
If problem persists,
Troubleshooting 101