Dear experts,
I have been to many other hobbist/expert forums but only this one exhibits such helpfulness and wealth of knowledge! (Troubleshooting electronics remotely is a hard thing to do!) This is such a great forum and I congratulate and thank everybody who has contributed.
So here is another newbie's (typical) story:
My friend wanted me to help fix a monitor as titled, exhibiting the "2 seconds to black" symptom, with the video still visible under flashlight. I opened it up, replaced all the caps with new low-ESR ones, but it became worse: now the backlight doesn't even come on, and the video signal is gone! Only the blue power LED stays on for 2s and then flashes slowly at about 1 flash per second.
Now having "gotten my hands dirty" I want to get this monitor fixed, and so hoping you folks can give me some ideas! I have already done the following (according to the sticky thread):
- Replaced all the radial electrolytic caps except the main filter (big) capacitor
- Checked the resistance of all the MOSFETs (no shorts), fuses (no opens), and transformer secondaries (identical resistance); I "assume" all are OK.
Suggestions are welcome!! Attached are PSU board photos.
In advance, a big THANKS!
Kevin
I have been to many other hobbist/expert forums but only this one exhibits such helpfulness and wealth of knowledge! (Troubleshooting electronics remotely is a hard thing to do!) This is such a great forum and I congratulate and thank everybody who has contributed.
So here is another newbie's (typical) story:
My friend wanted me to help fix a monitor as titled, exhibiting the "2 seconds to black" symptom, with the video still visible under flashlight. I opened it up, replaced all the caps with new low-ESR ones, but it became worse: now the backlight doesn't even come on, and the video signal is gone! Only the blue power LED stays on for 2s and then flashes slowly at about 1 flash per second.
Now having "gotten my hands dirty" I want to get this monitor fixed, and so hoping you folks can give me some ideas! I have already done the following (according to the sticky thread):
- Replaced all the radial electrolytic caps except the main filter (big) capacitor
- Checked the resistance of all the MOSFETs (no shorts), fuses (no opens), and transformer secondaries (identical resistance); I "assume" all are OK.
Suggestions are welcome!! Attached are PSU board photos.
In advance, a big THANKS!
Kevin
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