Sony 28-70 OSS electronics problem?

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Kostas L
Kostas L New Member • Posts: 6
Sony 28-70 OSS electronics problem?

Greetings everybody,

I have recently got a few SEL2870 lenses, but one of them shows some strange electronic issues. It seems fine at first: focus and aperture work as they should. But after a few seconds, it looks as it looses the communication with the camera body - flashes the screen and shows F--. After a few seconds it comes back to normal. And it goes like that back and forth without any input. Here is a video: https://youtu.be/4wwqVA_NXQA

What have I tried:

Cleaned the contacts of the lens and camera

Opened the lens to reconnect the ribbon cables from the main lens board.

To set some things straight:

Cameras tried: A7II, a6000, a9 (all with newest firmware) Lens version: .03. Lens seems to be in mint condition - no traces of use, mount hasn't got any scratches. Lens in out of warranty.

Thanks in advance!!

 Kostas L's gear list:Kostas L's gear list
Sony a6000 Sony a7R II Leica SL (Typ 601) Panasonic Lumix DC-S1R +1 more
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