(2) Power Led Comes On, No Serial Port Output - Roku Compact Hardware Manual

(2) Power LED comes on, no serial port output

This information applies to a product under development. Its characteristics and specifications are subject to change without notice. Roku assumes no
obligation regarding future manufacturing unless otherwise agreed to in writing.
No serial
port output
Is there 2.5V DC at
TP18?
Is there 1.2V DC
at TP20?
Yes
Is there 16MHz at
TP7?
Yes
Is RESET_L high at
pin 1 of U15 after
powerup?
Yes
Is SYS_RES_OUT_N
high at C188 after
powerup?
Yes
Check U25
for good
program and
good solder
joints, check
SDRAM
Check U18, L5, C212
No
No
Check U20, L6, C223
Check U3,
No
Y3, C186, C187,
R134, Nand flash
U25
No
Check U15,
U36, S2
No
Check U3
Check nand
contents U25,
check nand bus,
check sdram
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