helle,
3 days ago i got peggy2.3.
so i am finished with soldering and everything works fine.
the only problem is that column 23 is always lighting about 50 procent brighnes.
so i was trying as this column is working and yes the column works.

now i triede to changed the leddriver u4 and u5 and now column 7 is always
lighting.
so the problem must be the leddriver chip ?

changed the leddriver u4 and u5 and now column 7 is always lighting. so the problem must be the leddriver chip ?

Yes indeed. Please contact our webstore for customer service, to request a replacement pair of driver chips.

Now, the question becomes, did something go wrong that caused this to fail-- especially since you saw two different behaviors from the same chip. You might check column 7 carefully, to make sure that it's not short-circuited to the +V line, connected to the battery, for example-- that would cause the problem.