
No power or dead display
USI 3130 Horizon Ii 3w Super Vendor 3130 Horizon Ii 3w Super Vendor
No power or dead display
This initial diagnostic sequence helps narrow down the potential source of the operational issue using safe, preliminary checks.
Qualified technician handoff: stop before live electrical testing, sealed-system refrigeration work, compressor service, or protected-compartment access unless a qualified technician is handling the work.
- For any steps involving internal electrical components or system power, contact a qualified technician immediately.
- If the issue requires accessing internal wiring or power sources, a qualified technician must perform the assessment.
Checklist
Guided Diagnostic Steps
Work from low-risk checks toward technician-level inspection only when evidence supports it.
You can read or print the route now. The first checkbox click opens the service contact gate.
- 1
Visually inspect the exterior for obvious damage or obstructions.
technician-advancedmediumVisually inspect the exterior for obvious damage or obstructions.
Stop conditions- For any steps involving internal electrical components or system power, contact a qualified technician immediately.
- If the issue requires accessing internal wiring or power sources, a qualified technician must perform the assessment.
Expected: Initial condition is documented before deeper diagnosis.
Evidence to note: note
- 2
Confirm the machine is powered on and displaying any error messages.
technician-advancedmediumConfirm the machine is powered on and displaying any error messages.
Stop conditions- For any steps involving internal electrical components or system power, contact a qualified technician immediately.
- If the issue requires accessing internal wiring or power sources, a qualified technician must perform the assessment.
Expected: Initial condition is documented before deeper diagnosis.
Evidence to note: note
- 3
Perform the first diagnostic check as outlined in the service guide.
technician-advancedmediumPerform the first diagnostic check as outlined in the service guide.
Stop conditions- For any steps involving internal electrical components or system power, contact a qualified technician immediately.
- If the issue requires accessing internal wiring or power sources, a qualified technician must perform the assessment.
Expected: Result is documented before continuing the route.
Evidence to note: note
- 4
Proceed to the next diagnostic step only after the previous one is co...
technician-advancedmediumProceed to the next diagnostic step only after the previous one is complete.
Stop conditions- For any steps involving internal electrical components or system power, contact a qualified technician immediately.
- If the issue requires accessing internal wiring or power sources, a qualified technician must perform the assessment.
Expected: Result is documented before continuing the route.
Evidence to note: note
- 5
Document any observed behavior or error codes immediately.
technician-advancedmediumDocument any observed behavior or error codes immediately.
Stop conditions- For any steps involving internal electrical components or system power, contact a qualified technician immediately.
- If the issue requires accessing internal wiring or power sources, a qualified technician must perform the assessment.
Expected: Result is documented before continuing the route.
Evidence to note: note
- 6
Continue following the public-safe diagnostic guidance until a clear...
technician-advancedmediumContinue following the public-safe diagnostic guidance until a clear path is identified.
Stop conditions- For any steps involving internal electrical components or system power, contact a qualified technician immediately.
- If the issue requires accessing internal wiring or power sources, a qualified technician must perform the assessment.
Expected: Result is documented before continuing the route.
Evidence to note: note
- 7
If the issue persists, stop and document the machine state for expert...
technician-advancedmediumIf the issue persists, stop and document the machine state for expert review.
Stop conditions- For any steps involving internal electrical components or system power, contact a qualified technician immediately.
- If the issue requires accessing internal wiring or power sources, a qualified technician must perform the assessment.
Expected: Result is documented before continuing the route.
Evidence to note: note
Tools for this route
Parts status
Exact public parts list not verified yet. Use this route to identify the system before ordering.
Candidate areas for part verification
Other Possible Issues
Switch routes if this symptom is not the closest match.
