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There are 13 possible noise on hardware issues 1) Power supply crackling sound 2) Fan sound that sounds like a motor noise dragging 3) Harddisk clicking sound 4) CD rom spinning sound 5) Modem noise pinging sound 6) Application software resident in memory 7) Technician Neighbour drilling holes from your ceiling to do special wirings late at night, installing transformers 8) Ceiling fan with unstable modified electricity makes noise on motor issue 9) Sound that comes from switchboxes and transformer upstairs lighting up free electricity from your fan wires in your apartment unknown to you tapped by upstairs residents 10) Voltage regulator malfunction noise issue 11) Monitor crackling sound issue 12) Wirings crackling sound issues 13) Power socket crackling sound issues
Be sure you know where the source comes from, call PC vendor if you are uncertain, you will have to dismantle your hardware device in vendor's place to find out. Vendor will test one by one.
If computer fan is your issue, it is just a small issue there are many replacement at PC vendors based on quality corresponding to the price you pay
That could be several items such as power supply or main board, or Inverter . You can find out which board by contacting the people over at www.tvrepairworld.com they will help you determine which board is most likely causing the issue.
i have the same problem. i think they just get old, i solved the audio problem by taking the cove off the back and disconnecting the speakers, i now just use PC speakers, works grand. i haven't solved the HDMI problem yet..
It could be the inverter board going bad. The inverter board is what makes the back lights come on and has transformers on it that have high voltage. any time you have a noise like a buzzing or arcing you should have it checked