ECG systems · ELI family

Mortara ELI-250: troubleshooting and error codes

The ServiceForge knowledge base holds 7 documented symptoms for the Mortara ELI-250, with 14 ranked causes, 9 diagnostic checks with test points and expected values, and 0 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

AC power on, nothing on display

Backlight on but no content displayed; no response to key presses

Ranked causes

1. AC power supply failure (common)
2. Power supply or battery problem (common)
3. Keyboard/LCD cable disconnected (occasional)
4. Keyboard/LCD cable failure (occasional)

First check

Check AC fuses

Test point: AC fuse holders
Expected: Fuses intact and properly seated

1 more check with pass and fail actions, 4 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Unit operates on AC power only, not on battery

System works with AC power connected but fails to operate when switched to battery

Ranked causes

1. Battery fuse open (common)
2. Battery connection failure (occasional)
3. Battery failure (occasional)

First check

Verify battery fuse is installed and intact

Test point: Battery fuse location inside unit
Expected: Fuse present and continuity confirmed

1 more check with pass and fail actions, 3 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Optional modem transmit problems

Unit does not transmit via modem connection

Ranked causes

1. Missing or incorrect telephone number in configuration (common)
2. Incorrect modem initialization string (common)

First check

Verify phone number entry in configuration

Test point: Configuration menu modem section
Expected: Valid phone number present and correctly formatted

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

RS-232 transmit/receive problems

System unable to transmit or receive data via RS-232 port

Ranked causes

1. Baud rate mismatch (common)
2. RS-232 cable or port failure (occasional)

First check

Verify baud rate configuration

Test point: Configuration menu
Expected: Baud rate matches remote system (typically 9600 or 19200)

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

AC power on, LCD displays nothing

No content on display when AC power applied; speaker tone heard when key pressed

Ranked causes

1. LCD module failure (common)

First check

Press any key on keyboard and listen for speaker tone

Test point: Keyboard keys and internal speaker
Expected: Audible tone from speaker confirms system responding

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

No keyboard response and LCD frozen

Keyboard buttons do not respond; display shows no new data or updates; system appears locked

Ranked causes

1. Software malfunction or LCD not receiving data (common)

First check

Attempt On/Off key hold reset

Test point: On/Off button and system response
Expected: Unit powers off after 10 second hold; powers back on and functions normally

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Unit turns on but no waveform displayed

Display shows function key options but no waveform data; system appears to operate but data not updating

Ranked causes

1. Communications failure between front end board and motherboard (common)

First check

Press any key on keyboard and observe response

Test point: Keyboard input and display update
Expected: Display changes or waveform updates when key pressed

3 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Community

0 fixes logged by technicians through their AI, with outcomes, for this model.

ServiceForge knowledge base record. Field-unverified unless technicians confirmed it. A teaching summary of the record, not a service manual. Export 2026-10-14.