We have extensive experience on HP calculator repair, specially on the HP41family of calculators (we literlly "wrote the book" on HP41 repair!). We also routinely repair card readers, HP voyager calculators (hp12c, hp15c, etc.). We have also partners specialized on other HP calculator models, like Woodstocks, Classics and Spice series.
Typical repair costs are:
You can send your calculator to our premises. If you are not in the European Union, we will be charge import duties on the value you put in the documentation - which will be charged back to you. It is nearly impossible to do a temporal import for repair and the paperwork required takes months. Also, please do not use the postal system (USPS, Royal mail, etc.) for overseas shipments: it ends up in Correos and the bureaucracy to get it out of customs is nearly impossible to get done - with very tight deadlines. Most likely your package will be returned because Correos is not satisfied with the paperwork you and we provide. Better use a courier company.
Please contact us at firstname.lastname@example.org for quotes on repair of your other HP calculators.
Most of the HP41 repairs are quite mechanical in nature and do not involve spezialized equipment. We have written a book on HP41 repair intended for normal, non-EE users: