altec vs4121 user here....

tried replace TDA7377 with TDA7375 but fail.

anyone who know to check the ic whether it was faulty or not ?

really ? from the datasheet the TDA 7377 and TDA 7375 just a different with output power onli. TDA 7375 is 5 watt more than TDA7377
other spec are totally same.

yup. 1st batch have better quality.
i think u can follow some steps here to check

1st check whether your output from computer is normal.
try plug in using headset or another speaker to test.

if no problem, then the problem is on the speaker.
try plug out the right speaker DIN cable n see carefully whether the pin got damaged or not.

if no then plug in properly, try shake or bend or straight the wire c whether it got sound come out or not.
check whether the 3.5mm jack had rusted or not. try replace with another 3.5mm cable

if not then is internal problem. u will need to remove the screw and have a look for inside components.

determine whether the PCB board, components (especially the capacitor 2200uF) got damaged or not

determine whether the output from amp (TDA7377) is normal or not. (u can try using left channel speaker to conect to right channel of amp to test )

hopefully this can help u ...

good luck

This post has been edited by x-treme: Feb 6 2011, 06:32 PM

mean the problem is on the right speaker cable. i have no idea how to open that right speaker. except you smash it
juz b4 this should not bend the cable too much and too always

yup. 200 speaker can serve for 5 years. what can complain. can upgrade to a better 1 .. haha

normal 2.1 only.

wanna try change amp from TDA7377 to TDA7375 but failed.

modding this way, but why dont just order an amplifier board ?
something like this. haha.