I posted this in A guide to fixing/troubleshooting some common plasma TV problems 5 days ago but get no reply. I hope the moderator allow me to make a new thread.
Since then, I had changed the capacitor to new cap but it seems the fault wasn't lie in the PSU, at least not that particular cap. although the coil noise is quite loud.
I one by one disconnect every connectors I can find and finally found the culprit. it is the one on the top right corner, sec from right--the longer one. whenever the connector is inserted, the plasma will soft off or switch off, the same symptom I described above. I only manged to use the one "HDMI 1" connection, with no sound output from the plasma. all other input connections including aerial have no display--If I'm right, the connector is to supply power--I had shut it by removing the connector. the HDMI is on another board so it still work. if anyone need to know, the connector came from the PSU board, 11 o'clock from the bloated Cap. remove it also solve the switch off issue.
I physically examine the board but found no burn mark or bloated cap. since this is LSI board with many tiny SMD IC/chip/cap...it is impossible for me to troubleshoot and I doubt any repair guy would wanna touch it. I'm asking can anyone tell me what could possibly causing the shutdown issue?
short circuit?
dead IC/chip?
or the easiest way for me, when can I find a replacement?
Thanks.
Have a Hitachi plasma 42" 42PD9500TA, got it in Dec 2006. Not the best plasma even in its day but I love the way it scale 4:3 signal on 16:9.
This had been running almost non stop since 2006 with 12hours or more everyday. but today it suddenly switch itself off, I turn it back on with remote and it switch off again after an hour, then half an hour, gradually it switch almost immediately after I press the remote controller. standby power red LED is solid, not blinking, sounds fine when its on. power supply issue? cause everything looks fine, no picture artifact whatsoever.
As I have almost zero knowledge in electronic, I have no idea how to troubleshoot. Since Hitachi no longer produce plasma and the part is virtually impossible to find, this 6+ year plasma is worth less than $100 even if everything work. It doesn't make any economical sense to spend >$100(changing boards, chips, etc) to repair it.
Could anyone please take a look at the pictures attach and advise me if this is a bloated cap?
p.s. board is flip horizontally.
This had been running almost non stop since 2006 with 12hours or more everyday. but today it suddenly switch itself off, I turn it back on with remote and it switch off again after an hour, then half an hour, gradually it switch almost immediately after I press the remote controller. standby power red LED is solid, not blinking, sounds fine when its on. power supply issue? cause everything looks fine, no picture artifact whatsoever.
As I have almost zero knowledge in electronic, I have no idea how to troubleshoot. Since Hitachi no longer produce plasma and the part is virtually impossible to find, this 6+ year plasma is worth less than $100 even if everything work. It doesn't make any economical sense to spend >$100(changing boards, chips, etc) to repair it.
Could anyone please take a look at the pictures attach and advise me if this is a bloated cap?
p.s. board is flip horizontally.
I one by one disconnect every connectors I can find and finally found the culprit. it is the one on the top right corner, sec from right--the longer one. whenever the connector is inserted, the plasma will soft off or switch off, the same symptom I described above. I only manged to use the one "HDMI 1" connection, with no sound output from the plasma. all other input connections including aerial have no display--If I'm right, the connector is to supply power--I had shut it by removing the connector. the HDMI is on another board so it still work. if anyone need to know, the connector came from the PSU board, 11 o'clock from the bloated Cap. remove it also solve the switch off issue.
I physically examine the board but found no burn mark or bloated cap. since this is LSI board with many tiny SMD IC/chip/cap...it is impossible for me to troubleshoot and I doubt any repair guy would wanna touch it. I'm asking can anyone tell me what could possibly causing the shutdown issue?
short circuit?
dead IC/chip?
or the easiest way for me, when can I find a replacement?
Thanks.
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