Routerboard does not boot
If Netinstall can see the board, but can not install it
1. Troubleshooting flow chart
10 Routerboard does not boot
Measure inductor L103 resistance
Change defective
L103
Check 1.8V output on
transistor Q200 pin2
Change Q200
Measure ferrite bead
FB200 resistance
Change FB200
Change NAND
flash U300
Change 25MHz Crystal Y700
Change resistors R303, R305,
R306, R307, R308, R310, R311, R312
Change RAM U200
Change CPU U100
<1
Ohm
>1
Ohm
<1
Ohm
>1
Ohm
1.8V 0V
Problem still
appears
Problem still
appears
Problem still
appears
Problem still
appears
On U100 CPU silcscreen must be the same product code,
or You will lose the license. License may also lose if changes U901
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