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Troubleshooting
The most common symptoms and their causes are listed below, in three categories (general, transmit, and receive).
Most problems are related to control settings. If the problem persists, please contact Elecraft support (see pg. 70) or
post a question on our email forum.
General
§ MCU LD shown on LCD, and TX LED flashing: Do a forced firmware load (pg. 34).
§ ***** shown on LCD permanently: This may indicate that the KX2 did not power-down correctly.
Disconnect power for a few seconds, then try a forced firmware load (pg. 34).
§ Display backlight turns on, but then turns off upon release of switches: Disconnect all external equipment
from the KX2. Verify power supply or battery voltage is between 8 and 15 V.
§ ERR nnn (error) message appears in the VFO B area: Refer to Error Messages (pg. 59).
§ Scrolling message appears in the VFO B area: Refer to Scrolling Alert Messages (pg. 62).
§ PA FLT (power amplifier fault) message appears in the VFO B area: See KXPA100 owner’s manual.
§ BAT LOW is flashed periodically: Check the battery voltage (tap DISP and rotate OFS/B until the supply
voltage display appears). If the batteries are at their normal voltage, you may have MENU:BAT MIN set to the
wrong low-battery warning level. See this menu entry for recommendations.
§ Can’t turn power on: Check the power cable. If running from an internal battery, make sure it’s charged.
§ Can’t turn power off: If the display remains on, or the unit is otherwise unresponsive, disconnect the power
supply. (If an internal battery pack is in use, also remove the battery.) Allow 5-10 seconds, then reconnect
power and try turning the unit on.
§ General problem with transmit and/or receive: Many problems can be caused by low power supply voltage
or by a noisy or intermittent supply. Check your power supply’s on/off switch, voltage, fuses (if applicable),
and DC cabling. The KX2 provides both voltage and current monitoring (pg. 23). Also see Transmit and
Receive troubleshooting sections, below.
§ General problem with firmware behavior: (1) Check all menu settings (see menu listings in the previous
section). Hold MENU for about 3 seconds to see help information about each menu entry. (2) Try loading the
latest KX2 firmware. Review the release notes for changes that may be related to your symptoms.
§ N/A message (Not Applicable): The function you’re trying to use does not apply in the present context.
§ Mode icon flashes: This is a reminder that you’re about to set the KX2 up for cross-mode SPLIT operation
(VFOs in different modes). Tap any key to clear. To view and change VFO B’s mode, tap A / B .
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