Arduino Uno, 3S printed on a CTC bizer ... https://www.youtube.com/watch?v=b5XHIsdF1vY

This was sent in by another viewer who was having a situation where the projector would run for a bit. Then it would freeze and shut down. Their initial diagnosis showed the lamp fan no longer spinning. This is not uncommon in Sim2's of that age. The power supply was repaired at one point in the past but they used the wrong value capacitor. This was causing a slight delay in startup but did not cause any real problems. I opted to replace it with a correct capacitor anyway and replaced another that was suspect in my opinion. Originally I had thought about replacing all the fans. Instead we opted to change the one fan on the lamp even though I got it working. With some repairs you need to take the age of a device into account. The other 2 fans are not showing any signs of trouble. Rather than waste the owners money on things that aren't broken, we are only replacing the one fan. If they start to act up at a later date they can be addresses then. Until then this will save the owner some money. I suspect he will replace this Sim2 before the fans ever fail. The fan sizes are 80x80x15mm and 60x60x15mm. The lamp is a 120W P22 reflector (UHP in this case but PVIP will also work). Bare Bulb: https://www.projectorlamps.com/sim2-projector-lamps_ht3000e-bulb.html There seems to be a run of Sim2's lately. They are a lot of fun to work on. Part 2 https://youtu.be/ml_pJGzAnJM Thank you for watching and if you have any question please let me know. ... https://www.youtube.com/watch?v=D4N6I2CBXAg

Ballast replacement in an Optoma HD70 that had no lamp light. Not a common failure in what I have seen. I suspected bad caps in the power supply as that is common. I had to trouble shoot more. ... https://www.youtube.com/watch?v=mA49cN-SIwc

Another HT1075, another shut down via fan error. The owner had replaced the blower fan but kept having Fan 3 failures. Fan 3 is the turbine/lamp blower fan. After speaking to him, we agreed that the errors just didn't make sense so he sent it to me to check. I found what I thought was a lot of dust build up but apparently 2 big dogs in the house create a lot of dust. I should have known better, with a house full of cats, the hair deposits on vacuum day look like they have been there a year when it's only been a week. There were some mixed up screws too. I don't blame anyone for doing that. If its the first time you open something it can happen. I suggest making a little "map" or drawing and then putting the screws on that paper or cardboard. I'll show that in another video someday. The fact that they tried is awesome in my opinion. Everyone should try if they want to. I decided to do a full tear down and evaluate everything after finding some broken screw towers. It led me to find that the mainboard had some screws mixed up with chassis screws which likely led to the mainboard becoming detached from the DMD riser after enough vibration. After cleaning everything and replacing the base of the projector with a scrap base, I found that the unit works great with all of the screws in the right spot and a good cleaning. As of this video, I am still running one of these myself as my own projector and I love it. If you have a lot of dust in your area(desert, farm, animals etc.) some open cell foam may help as an external filter. I'm referring to the stuff used in window air con units. As an example, https://www.mcmaster.com/air-filters/filter-style~roll/mildew-resistant-reusable-air-filter-rolls/ Put a piece of that on the Intake side(opposite the fan) and it will help. To buy a lamp for this model , click here and use code YT50 at checkout for 5% off. https://www.purelandsupply.com/benq-lcd-projector-lamp_ht1075.html Thanks for watching! \o/ 00:00 Intro 00:45 Disassembly begins 02:09 Fan scope check 04:23 Continue disassembly 13:45 Evaluate base damage/Replace base 14:05 Re-assembly begins 33:02 Initial testing 35:44 Final assembly after testing 47:35 last test and closing ... https://www.youtube.com/watch?v=ijO6Q9WJInU