I already check capacitors on the board. All components it seems to work normal , no overheating. Which tools I need to make firmware upgrade ?
How did you check the capacitors on the board - what test equipment did you use? Did you test the capacitors out of circuit?
Used to have a coupe of Draytek's - overheating? All mine seemed to be hot enough to broil a steak - I am almost suspicious that your Draytek is running cool! But of course it could be running cool because it wont complete booting so no CPU load to generate heat OR a component (capacitor?) has failed and stopped operation of a portion of the router - or the CPU is not supplying enough voltage so the under-volted router is running cool?
Could be 4 or so years old. Drayteks have, for as long as I've seen them in the wild, suffered from power supply problems. If the power supply is suspect it could easily cause a corrupt firmware, but you should be able to recover it.
I solve this problem. The WAN IC is broken with shortcircuit over Vcc+.Now the router is working without WAN ports.Prehaps it was lighting over the ethernet cables. Thank you all for support and ideas.
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