Home |
Search |
Today's Posts |
|
Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
#1
|
|||
|
|||
Dell M992 Monitor Clicking Noise....
My brothers Dell M992 Monitor stopped working 2 weeks after the warranty ran out!!! Instead of letting him throw it away, I took a look at it. I have a little experience in electronics, but I never troubleshooted a monitor/tv before. When turning it on, I hear a clicking sound. (Sounds like someone running their thumb nail down the teeth of a comb.) I took the back off of the monitor and turned out the lights. I can see a small diode? (clear glass with some color bands) arcing (inside its glass) to the clicking noise. The diode is located in the 7" x 5" metal "box" behind the yolk... On the circuit board it is marked as SK104. If anyone has came across this problem and/or can give me some insight, please respond. The only piece of test equipment I have at the moment is a Fluke 179 Multimeter. Thanks, John |
#2
|
|||
|
|||
Dell M992 Monitor Clicking Noise....
There is a failure in the power supply, and or the HV drive, and or the scan
circuits. This is not something for a beginner to troubleshoot. You will need a lot more than a simple DVM. It takes a lot of experience, and proper training to service these monitors. Depending on the problem, you will require the proper instruments to troubleshoot the monitor. The arcing you see, is not in a diode. It may be a spark gap type device that is discharging an overvoltage. I would have to see (and possibly the service manual) it to know what this is. Unfortunately, the manufactures will not sell the service manual, or any internal replacement parts to non authorized service centres. You can bring the monitor to a service centre that is authorized for DELL monitors for an estimate. It is possible that it may be able to be serviced for a reasonable cost. There are many safety issues to be concerned with, when troubleshooting monitors. The voltages and current sources used can cause serious injury. -- Greetings, Jerry Greenberg GLG Technologies GLG ========================================= WebPage http://www.zoom-one.com Electronics http://www.zoom-one.com/electron.htm ========================================= "John" wrote in message ... My brothers Dell M992 Monitor stopped working 2 weeks after the warranty ran out!!! Instead of letting him throw it away, I took a look at it. I have a little experience in electronics, but I never troubleshooted a monitor/tv before. When turning it on, I hear a clicking sound. (Sounds like someone running their thumb nail down the teeth of a comb.) I took the back off of the monitor and turned out the lights. I can see a small diode? (clear glass with some color bands) arcing (inside its glass) to the clicking noise. The diode is located in the 7" x 5" metal "box" behind the yolk... On the circuit board it is marked as SK104. If anyone has came across this problem and/or can give me some insight, please respond. The only piece of test equipment I have at the moment is a Fluke 179 Multimeter. Thanks, John |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Makita Cordless 18V Drill - Chuck Noise | UK diy | |||
How to Adjust the Tape Path Alignment on Newer VCRs | Electronics Repair | |||
IIYAMA Monitor model : S102GT, and DELL P1110, are they the same monitor? | Electronics Repair | |||
Hitachi Projection TV Loud Cracking/Popping noise from Speakers | Electronics Repair | |||
Noise reduction | Woodworking |