20 Most Recent Philips Aquatouch At890 Wet And Dry Rechargeable Electric Shaver With Pop Up Trimmer Questions & Answers

It would appear that the gear is broken or the spring is missing. The tiny part is not available for replacement. The least expensive remedy for this would be to purchase the replacement below for only $9.99 at shaveroutlet.com Philips Norelco AT752 Shaver Replacement Lower Unit

I am having problems filling in a guarantee form for my AT890 wet and dry shaver

Model AT890 requires replacement heads with part number HQ8. If the blades you purchased are not HQ8, you have the incorrect parts. HQ8 blades can be found at shaveroutlet.com at the link below http://shaveroutlet.com/norelco-philips-hq8-spectra-sensotec-replacement-heads-p-251.html

If it's not in warranty, dissassemble the shaver and check for water inside. Either dry it out in a warm cupboard or displace the water with WD40

Replacement under warranty involves promising to remove the battery from the old shaver and disposing of the battery and the carcass in an environmentally safe way. The shaver can be split apart after removing three torx screws and then prising the plastic parts apart against their clips. Be VERY careful when releasing the plastic clips inside because they are brittle and fragile. On opening the cover containing the battery, motor and control circuitry the ingress of water was clear. The shaver is supposed to be wet and dry, has only been used dry but the exterior has been washed. The water was displaced using WD40. The shaver operated normally straight away. If your shaver's motor starts with the button but stops again half a second later, the problem might be caused by water ingress.

try documents check battery comp.