Niklas wrote:
> Hello,
> Without the complete schematic, it's difficult to identify the exact cause, but 
checking clock signals, reset timing, and power stability would be a good starting 
point. Many embedded issues come from initialization problems rather than software 
alone. Older digital designs using HEF4040BP discontinued stock 
(https://www.ovaga.com/products/detail/hef4040bp) also require careful 
verification during maintenance.
> I'm currently working on repairing my bike charger, the ORBEA Li-ion
> Battery Charger (Model: BC299360040).
> I’ve already found the fault and now need to replace the two blown
> resistors. That’s where the problem is.
> Does anyone know the values for R31 and R42, or even have the schematic?
> Unfortunately, I haven’t found anything online, so I’m hoping that one
> of you has already repaired this charger or has another idea.
>
> Thanks a lot! :D

Looking at your photos, R31 and R42 appear badly burned, so I'd avoid 
replacing them until the root cause is found. They may be current sense 
or startup resistors, and something downstream could have shorted. If 
someone has the same charger, measuring those resistors in circuit or 
sharing a high resolution photo would probably be the quickest solution.