Dave45678

I bought a brand new Hornby railroad 9F, R3942. Ran really well as a DC engine. I have just fitted a Hornby DCC chip (fits in tender but had to open both the tender and the engine top during fitting.) The engine can now be programmed and runs as a DCC engine but stops very frequently especially on points. The 9V battery test showed the following: 3 axles (front 2 engine axels and front tender axle) are dead - no pick up at all. 2 axles have poor intermittent pick up (rear two driving axles). 2 axles are working well (rear 2 tender axles). All the wheels and pick ups and track are clean and the pick ups appear to be in the right place touching the back of the wheels. Can anyone suggest what has happened or how to fix please.