This UPS came in my hands after an unsuccessful repair attempt from another technician. The symptom it showed right after powering it was no reaction at all. The front and back...

                The complaint of this small speaker horn was no sound and it was repaired by someone before. This is a pretty straight forward repair. Just remove the screws and...

              The complaint of this Etech hot and cold water dispenser was it has power and the “hot” side can work but the “cold” side was not giving out cold water....

            PC Intel D 326 cooling problem I got a call from a local woodworking company. They called me because one of their PC is in some case to slow and they cannot work with...

                The complaint of this Polytron LED TV was no picture and no light but there was sound. When I used a torch light to shine at the panel, i could see...

              In the following five steps you will have a fuse tester and a quick voltage indicator for cars STEP1: What you need: 1- One neon tester for line voltage screw...

                This is a very simple question, so simple that we usually don’t think too much about it and use whatever we know is working. The voltage might be 5V,...

              Here are the previous article: https://www.jestineyong.com/tektronix-2440-oscilloscope-repair/ (Part 1) https://www.jestineyong.com/tektronix-2440-oscilloscope-repaired-part-2/ https://www.jestineyong.com/tektronix-2440-oscilloscope-repaired-part-3/ Today I opened the already completely repaired 2440 Tektronix Oscilloscope again to try and fix some of the remaining FAIL errors....