Dear Doungjai,
I don't understand what you mean. What some problem of Q-Switch in the latest order? Send new Q-Switch to you?
You mentioned you changed Power Q-Switch the laser leak symptoms disappear and machine OK. So why still need to send you new Q-Switch when you changed the Power Q-Switch? And when you mean power Q-Switch are you talking about the Q-Switch Power Supply.
Also please include Mr. James, the machine serial number in the email for future technical issues.