Well the issue has returned. Managed to get it to run at 500m V5 for a while, then just starts resetting the Target lower and lower until it just ends in a boot loop kind of thing.
Any ideas anyone?
My guess is you have fallen victim to the temp sensor. Its a very well known issue so perhaps you should contact whom you purchased from to find out what, if anything, you can do. Selling it on e-Bay the way it is isn't the solution.
If you can get an answer from your provider then perhaps you can decide which way to proceed; otherwise its rather unscrupulous to pawn it off on on somebody else without providing the above information.
I was meant to update this. Its got me stumped. Currently running at 600m V5 for the past couple of days without issue. It could well be a problem with the Pi instead. But I don’t know. It works fine when it works. When the issue arose then it would take a couple of power cycles and then it would work fine on stock settings.