R-Mod no Solder mod chip

[Preyhunter]

I'm having the same problem with my brother's PS2. After holding down the eject button for a few seconds, it makes a high pitched whistling sound, pauses for about 3 seconds, then makes the sound again. The sounds occur when the tray is SUPPOSED to be ejecting and going back in. I removed then reseated the chip and both ribbon cables, but that did not help. Everything else functions as it should. A quick press of the eject button ejects the tray and another makes the tray go back in. All originals still play as normal. Swap Magic discs do as they are supposed to. This leads me to believe that the chip itself is faulty. His is a version 5 as well. The chips we received are good for V5/V6/V7. The same version chip works fine on my V7, though I have not tried his chip on my machine. Kinda don't want to mess with mine since it's working, though that may be the only way to tell for sure whether it is the chip or not.