my laser doesn't work, just a weak red light (but it's green) Model JD-851

[neymarJR]

it was working normally, until one day it didn't work anymore except for this faint red light, it has this button on the board, what could it be?? if anyone can help me i would appreciate it. I'm brazilian my english is bad hahaha.

 

[Ears and Eggs]

Do not look into the aperture. You could seriously damage your eyes. Stop using the laser. Some green lasers use a set of crystals to make green light. There is a high powered near infrared diode in the laser that powers this system. If the crystals got bumped or knocked out of position it could stop producing green light and just spill out huge amounts of infrared instead. Could the laser have got bumped or jolted at all? It's not going to be easy to realign the crystals if that's what happened.

 

[neymarJR]

really someone must have knocked him down, don't worry I didn't look directly at the laser haha. Thanks for your response

 

[paul1598419]

That button is on the driver board and is used to turn the laser on and off, but may have been shorted out if the host uses a different button instead. If it is used it will line up with the button on the host.

 

[Sowee7]

The crystal is probably loose (as Ears and Eggs explained) or it could have a damaged pump diode. Do you hear a rattle when you move it around?

 

[RedCowboy]

Interesting, OP refers to the laser as " him " just like Borislav@87 does, maybe they are both using a translator program ?

 

[daguin]

In reality, nothing had to have "happened to" the laser for it to fail. It does not necessarily require a bump or drop. Sometimes the temperature just reaches a tipping point. Sometimes it is simply that it has heated up enough times for something to shift. Often, there is no one to blame but physics
In any event, it is dead and now just a potential host

 

[paul1598419]

Glad to see you posting again daguin.