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The criticism of this 17 “The Compaq Liquid crystal display Monitor was shutdown just after a couple of seconds to handful of minutes. shutdown. The very first detail one would usually suspect is the faulty backlight. For your information and facts, a undesirable or a weak backlight can trigger these issue and dry joints may also add to the trigger of the fault.
Considering the fact that I have a spare backlight, I swapped the Lcd backlight with the operating one. It is uncomplicated to do it, just remove the present backlight connector and connect the very good backlight connector to it. I have examined one particular by just one the backlight and the final result was the Lcd Monitor nonetheless shutdown intermittently. This has delivered both equally of the Liquid crystal display Monitor backlights are ok! So now my focus is on the lookout for any dry joints in the Liquid crystal display Monitor.
I set again all the internal metal casing like first except the main include and change “ON” the Lcd Monitor. Whilst at my still left hand holding the Lcd Monitor, my suitable hand keeping the shaft of the screw driver, I began to gently knock on the Lcd Monitor interior metal casing with the deal with of the screw driver. The moment I hit 'it, the Lcd Monitor went straight into shutdown. Wow! From the test I think you would have identified what is the bring about of the Lcd shutdown-it was dry joint.
Opening up the casing all over again, you can obviously see a few boards ie the ability / inverter board, audio board and the Principal board. I only suspect the electrical power / inverter board simply because this is the board that controls the backlights. What I did was resoldered all the parts in the inverter place other than the SMD parts because SMD elements not often have dry joints.
When I power “On” the Liquid crystal display Monitor and hit it with the deal with of the screw driver, the Monitor once more went into shutdown. I instructed myself “it can not be” but anyway I have a really superior self-confidence that the fault ought to be in the inverter area and not in Primary board or ability board. Up coming, I diligently hold the Lcd panel and use a examination pen to carry up the corner of the inverter board and energy “On” the Monitor. Guess what materialize? The Monitor did not shut down even even though I 'hit' a tiny bit hard on the metallic casing. This again offered that the dilemma is somewhere in the inverter location.
I opened up again the steel casing and meticulously scanned as a result of all of the elements in the inverter area-it glimpse like I have by now used fresh new solder to it. It was only the feed-back circuit that have SMD parts that I have not solder. I utilized a magnifier glass to look at if there are any dry joints in all of the responses parts but I do not see any. I went forward to resolder all of the SMD parts in the responses circuit and energy “On” the Monitor. To my astonished, the Lcd Monitor no additional shutting down no matter which way or how I tapped the Lcd Monitor with the cope with of the screwdriver. I put the Liquid crystal display Monitor for several hrs of melt away in examination and it just labored wonderful. I have sent back again the Liquid crystal display Monitor to my consumer and till now right after couples of days there is no call from my client.
Conclusion – Do not forget the dry joints in SMD factors. Each and every element in the digital board can be a suspect. Hope from this short article you can get some suggestions about resolving intermittent dilemma in Lcd Monitor.
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