# Diode laser diagnostics
HTML source: [Diode laser diagnostics](https://lasertechservice.pl/en/services/diode-laser-diagnostics/)
Language: English
Other language version: [Polski](https://lasertechservice.pl/uslugi/diagnostyka-laserow-diodowych/), [Русский](https://lasertechservice.pl/ru/uslugi/diagnostika-diodnyh-lazerov/)
> Diode laser device and handpiece diagnostics from EUR 165. Written technical conclusion. Free when you commission Laser Tech Service to repair the device; travel charged separately.
We identify faults in laser devices and handpieces so that aesthetic clinic, salon and laser hair removal studio owners can make informed repair decisions. Wrocław and throughout Poland.
from EUR 165
**Free diagnostics when you commission a repair**
Engineer travel is charged separately, including when you commission a repair.
[Book diagnostics](https://lasertechservice.pl/en/services/diode-laser-diagnostics/#diagnostic-form)[Call us](tel:+48790402597)
## What do diagnostics include?
### Laser equipment diagnostics
We assess the device in relation to the reported problem, taking its design and the conditions in which the fault occurs into account.
### Laser handpiece diagnostics
We check the handpiece and how it operates with the device. The scope depends on the model and symptoms.
### Identifying the cause of the fault
We locate the source of the problem and distinguish symptoms from causes. We do not assume that the laser diode module needs replacing.
### Recommendations and proposed repair
We provide a verbal explanation, a written technical conclusion, recommendations and a proposed repair.
## When does a diode laser need diagnostics?
Similar symptoms can have different causes. The cause can only be established by examining the specific device. We tailor the work to the model and problem; not every diagnostic assessment requires the same measurements, dismantling or calibration.
### The laser will not switch on
The problem may involve the incoming power supply, connections, power supply unit or control system. A device that does not respond does not necessarily have a damaged laser module.
### Handpiece not cooling
The cause may involve coolant circulation, heat dissipation, power or cooling control. In models with thermoelectric cooling, the Peltier module may also be relevant.
### The laser has lost output
Reduced performance may relate to contaminated optics, the laser diode module, the power supply or a protection system limiting operation. Observing treatment results does not replace a technical assessment. [Read more →](https://lasertechservice.pl/en/blog/why-laser-diode-modules-fail/)
### The device overheats
Restricted airflow, a dirty heat exchanger, a faulty fan or coolant circulation problems may impair heat dissipation. Operating conditions must also be considered. [Read more →](https://lasertechservice.pl/en/blog/laser-cooling-system-cleaning-overheating/)
### Error messages appear on the display
A message may relate to temperature, flow, communication or other protective functions; the meaning of a code depends on the model. Please provide the exact code and when it appears.
### No laser pulse
Possible causes include the device not being ready, an active safety interlock, a trigger signal problem, a handpiece connection or the power supply. This does not automatically mean the diode needs replacing.
## How do diagnostics work?
1. ### Report the fault
Tell us the symptoms, your town or city and the model, if known. Describe the circumstances in which the problem appeared.
2. ### Agree the arrangements
We confirm the scope, diagnostic cost and service arrangements. Travel and its cost are agreed separately.
3. ### Inspect the device and handpiece
We carry out a technical assessment appropriate to the device design and reported symptoms.
4. ### Explanation and written conclusion
You receive a verbal explanation of the findings, a written technical conclusion, recommendations and a proposed repair.
5. ### Your repair decision
There is no obligation to proceed with a repair. If you commission Laser Tech Service to repair the device, diagnostics are free. Travel remains a separate charge.
## Diagnostic costs
### Diagnostics without a repair order
**from EUR 165**
### Diagnostics with a repair order
**EUR 0**
### Engineer travel
Charged separately
We do not charge for diagnostics when you commission Laser Tech Service to carry out the repair. This is not a refund, discount or EUR 165 deduction from the repair price. Transport is not included.
[See diagnostic and travel charges in the price list →](https://lasertechservice.pl/en/pricing/#ceny)
## Examples from our work
These documented cases show why symptoms must be traced to their cause. The fan replacement example concerns a laser device whose technology has not been confirmed, rather than a confirmed diode laser.
[Laser handpiece and applicator refurbishment](https://lasertechservice.pl/en/services/laser-handpiece-repair/) — repair scope and terms from EUR 220.
[Laser power supply and electronics repair](https://lasertechservice.pl/en/services/power-supply-electronics-repair/) — repair terms from EUR 165.
### Module replacement after liquid ingress — Poznań
**Symptom:** A damaged laser diode module following liquid ingress.
**Cause:** An incorrectly seated seal caused a loss of watertightness and liquid ingress into the module.
**Result:** The module and seal were replaced, restoring the assembly's seal.
[Full case study →](https://lasertechservice.pl/en/case-studies/flood-damaged-diode-module-replacement-poznan/)
### Diode laser handpiece service — Poznań
**Symptom:** A leaking handpiece with contamination inside.
**Cause:** Loss of housing integrity allowed dust to enter, including the optical area.
**Result:** The interior and optics were cleaned and the handpiece was resealed.
[Full case study →](https://lasertechservice.pl/en/case-studies/diode-laser-handpiece-service-poznan/)
### Cooling fan replacement — Wrocław
**Symptom:** Insufficient cooling of a laser device.
**Cause:** Faulty fans and substantial dust inside the device.
**Result:** The fans were replaced, dust removed and restored cooling operation checked.
[Full case study →](https://lasertechservice.pl/en/case-studies/laser-cooling-fan-replacement-wroclaw/)
## Diagnostic questions
### How much do diode laser diagnostics cost?
Diagnostics without a repair order start at EUR 165. This includes the device and handpiece, fault localisation, recommendations and a proposed repair. Travel costs are agreed separately.
### Are diagnostics free when I commission a repair?
Yes. If you commission Laser Tech Service to repair the device, diagnostics are free. This is not a refund or discount. Travel is charged separately.
### Is travel included in the diagnostic price?
No. Transport is not included in the price from EUR 165 and does not become free when you commission a repair. Its cost is agreed before the visit.
### Can you diagnose the handpiece on its own?
Handpiece diagnostics are part of the service. If the problem only concerns the handpiece, describe it when contacting us. Whether we can check it without the device, and on what terms, is agreed individually according to the model and symptoms.
### What will I receive after diagnostics?
You will receive a verbal explanation of the findings, a written technical conclusion, recommendations and a proposed solution to the identified fault.
### Do I have to commission a repair after diagnostics?
No. You decide after reviewing the findings and proposal. Without a repair order, diagnostics start at EUR 165; with a repair commissioned from Laser Tech Service, they are free. Travel is charged separately in both cases.
## Book diagnostics
Engineer travel is charged separately, including when you commission a repair. [+48 790 402 597](tel:+48790402597) · [contact@lasertechservice.pl](mailto:contact@lasertechservice.pl)
## Service offerings
- [Professional laser and aesthetic equipment servicing](https://lasertechservice.pl/en/services/)
- [Service pricing](https://lasertechservice.pl/en/pricing/)
- [Technical Service for Beauty Salon Chains and Aesthetic Clinics](https://lasertechservice.pl/en/services/service-for-salon-chains/)
- [Laser handpiece and applicator refurbishment](https://lasertechservice.pl/en/services/laser-handpiece-repair/)
- [Laser power supply and electronics repair](https://lasertechservice.pl/en/services/power-supply-electronics-repair/)
## Related articles
- [Why do diode modules fail in hair removal lasers? Causes, symptoms and consequences](https://lasertechservice.pl/en/blog/why-laser-diode-modules-fail/)
- [Why is regular laser cooling system cleaning so important? Dust, fan failures and overheating risks](https://lasertechservice.pl/en/blog/laser-cooling-system-cleaning-overheating/)
## Related repairs
- [Flood-damaged laser diode module replacement – Poznań](https://lasertechservice.pl/en/case-studies/flood-damaged-diode-module-replacement-poznan/)
- [Diode laser handpiece servicing — cleaning and resealing](https://lasertechservice.pl/en/case-studies/diode-laser-handpiece-service-poznan/)
- [Laser cooling fan replacement and device maintenance — Wrocław](https://lasertechservice.pl/en/case-studies/laser-cooling-fan-replacement-wroclaw/)