V3 Tray open but wont close...help !

[TRABEL]

v3 had USB KEY installed. ps2 worked fine .
i removed the wire from the usb key , and installed modchip (duo 2 se).
after install , i power up ps2 ... tray goes out ... but wont goes back in ...
if i give tray a little push it'll goes back in when push eject while tray is opening it'll close back , wont close only when it open till end
same problem after i removed the modchip ...
i replaced board and all fine.... problem is in the board and not on drive or any other part ...
all fuses are o.k ..
maybe a cap blowed and wont give rotor the right power ??
please ideas ... where to look or what
thx

[TRABEL]

k
problem fixed .... for whi is interested , point Z on duo modchip got ****ed somehow , i have replaced all 4 pack of resistors , and problem solved.
thank's to duo modchip support , a quick replay and very good help.

[Jadeps2]

What resistors did you have to replace? I have the same exact problem after removing a Neo DVD key out of a V5. I emailed duo support and the guy said to check for solder splashes which I obviously did. I have installed several Duo 2's and this is the first time I have had a problem. Let me know what I need to replace. Thanks!

[EDEM]

replace one resistor 10k on Z point

[Jadeps2]

It's near the Z point connection? Also my dumbass used the exact same Duo 2 SE and put it into another V5 PS2 I just got and it wasted that one also. Except this one has a different problem. It does not eject at all and has no video. Both power and eject buttons light up and you hear the fan going. So I take it this chip is is crapper. At this point I just want to fix these two PS2's.

First one: powers on and fires the tray out super fast and stays out unless you manually push it in and has no video.

Second one: Powers on, but has no video and does not eject at all.

Please give me some specifics on what I need to replace.