no external crystal 16Mhz after loading bootloader

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hi all,

i have no external crystal oscillator (16mhz) atmega88p after burned bootloader it. used uno atmega328p board burn bootloader plain atmega88p , burned. placed atmega88p uno board , uploaded led blinking example , worked fine. however, check external 16mhz crystal oscillator oscilloscope , signal 0v. wonder whether bootloader when burn configured run internal clock instead of external. has ideas why happens.
please help, big appreciated !!!   

it not surprising don't see 16 mhz scope effect oscillator.
if blink works @ proper timing, oscillator ok.


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