for ur first question
its possible

2nd question
i dun understand much

pionner amp only hav 1 hdmi output
all ur composite, component, hdmi video input is out thru the pionner hdmi output
u must set it
it doesnt auto detect

when im usin my old 519 its quite easy
bt when im usin my new 919 its harder abit

so i trust ur 819 can also do it
just u need to check the manual
cuz i think not all the models r the same

bt u can try go to ur home menu
then system setup
then input setup
after all is done
make sure u r in the right input
example would b
if u plug ur composite at tv/sat
then change ur input to tv/sat

tat is how i did it wit the 919

wit the 519 there r no home menu on the remote
so its just plug in the cables n change to the correct input

let me get tis
u got sound bt no video

did u match the inputs
if usin tv/sat
optical is same as the composite
it must b matched

let me get me 919 manual

cant ur media player hdmi output send both video n sound to the avr n then output to tv
why u separate both
try to check ur input assignment is correct

cux the 1st time i set mine
i also got sound bt no video
wat i did was
check the input
n try diff input

bt since if u use hdmi to tv u got video
bt do u hav sound

if all else fails
get an optical cable n use it instead of rca lolz

another thought
right now im watchin my remote
i saw a signal sel button
do u hav it
try to press n change ur signal to hdmi
i know tis button helps me b4
i just remember after watchin my remote

paiseh
sry cant b of help to u

how come pioneer thread bcome sony then yamaha thread
n i dun think tis is buy n sell thread

subwoofer on cabinet is really kind of weird

just a thought
hav u tried to put it in front of ur cabinet on the floor

wow
nice amp u got there
time to buy a new plasma or lcd or even led

can tell u
the amp sound is really btr than my old 519 lolz

hahahha
im usin 919 also lolz
current is floorstander
then its also full 7.1 now

im thinkin of gettin new speakers n plasma 2 to 3 yrs down the road
we got the same taste bro

actually i did plan to
bt then giv up
my voice very sarkz
so i giv up lolz

dunwan hurt my neighbours ears

cant help it if enjoyin
so i turn to neway for tat