Tuner B not found

[mcmbp1]

My box keeps on rebooting when i try and do a sat check on tuner B.
When I do a recording and change channels its says no tuner free?

Any ideas welcome

Box details are:

Brand: Vu Plus
Model: duo
Chipset: 7335
Total Memory: 138380 kB
Free Memory: 48500 kB
Software
Kernel version: 3.1.1
Firmware version: 3.0.653
Gui version: 2013-04-27
Tuners
Tuner A: BCM7335 DVB-S2 NIM (internal) (DVB-S2)
Tuner B: BCM7335 DVB-S2 NIM (internal) (DVB-S2)

Both set to 28.2 on a quad LNB

[duoduo]

Try updating the image mate and see if this helps

[mcmbp1]

Have updated the image an d have the same problem

[Rob van der Does]

Please flash your box with build 685. If you first make a settings backup you can use that during the first install wizard.
If the problem persists after the flash, flash again but do not restore any settings.

[mcmbp1]

First Flash with restore did not work.
Second time without restore I can now use tuner B and do dual recordings.
Now just to put pack all my setting one at a time to make sure the tuner doesn't disappear again.

Thank you for your advice

Mark