FP731 Benq LCD Screens Problem Is No Power
The BenQ LCD Monitor mannequin FP731 downside is no energy symptom. You probably have read my previous articles, you would know that I would not quick use all my testing gear to examine the entire energy and inverter board as an alternative I'd use my eyes to scan all the components first before beginning to use my digital multimeter to examine on the fuse and other elements first.
I saw about 8 filter capacitors that had bulged and leaked on prime of its capacitor casing. We have now the primary clue and if my assumption is correct, only the capacitors that brought about no power symptoms. Nevertheless with a purpose to be in the secure side we've to examine different elements as well.
Trying at the power main aspect did not reveal any burnt or cracked elements in the board. It isn't adequate just by wanting on the board, we must test few of the vital elements first with the intention to confirm that it is protected to switch on the facility after the alternative of the eight defective capacitors. The vital elements that I referred to was the fuse, energy or chopper fet (mosfet), change mode power provide primary winding and secondary diodes. When you have the experienced, you can examine the entire elements on board with out removing it but in fact the smps major winding you need to use a flyback tester to check it.
After all of the crucial components examined okay, I might presume that after the alternative of the faulty capacitors, I might instantly swap on the LCD Monitor with out connecting a light-weight bulb first. There isn't any crucial to attach the light bulb as a result of the ability facet elements were examined okay besides the fuse did not blow in the first place.
To your info, a lot of the capacitors used in the LCD power provide had been from the 105 diploma Celsius in order to last more and stand the heat produce by the ability supply itself. In case you change with an eighty five Celsius capacitor, it might not last long and will come back with capacitor problems again.
The Benq FP731 LCD Monitor problems was restored to normal operation after the eight filter capacitors was replaced. Capacitors breakdown was quite common in the LCD Monitor due to it compact design the place the heat have difficulty to transfer out due to the power supply board was coated by an aluminum shielding. Typically after few hours of operation, you could possibly feel the intense heat on the aluminum shielding and surrounding area. This can be a excellent news to us as an digital repairer as a result of an increasing number of LCD Monitor send in for repair because of capacitors faults only.
FP731 Benq LCD Screens Problem Is No Power
The BenQ LCD Monitor mannequin FP731 downside is no energy symptom. You probably have read my previous articles, you would know that I would not quick use all my testing gear to examine the entire energy and inverter board as an alternative I'd use my eyes to scan all the components first before beginning to use my digital multimeter to examine on the fuse and other elements first.
I saw about 8 filter capacitors that had bulged and leaked on prime of its capacitor casing. We have now the primary clue and if my assumption is correct, only the capacitors that brought about no power symptoms. Nevertheless with a purpose to be in the secure side we've to examine different elements as well.
Trying at the power main aspect did not reveal any burnt or cracked elements in the board. It isn't adequate just by wanting on the board, we must test few of the vital elements first with the intention to confirm that it is protected to switch on the facility after the alternative of the eight defective capacitors. The vital elements that I referred to was the fuse, energy or chopper fet (mosfet), change mode power provide primary winding and secondary diodes. When you have the experienced, you can examine the entire elements on board with out removing it but in fact the smps major winding you need to use a flyback tester to check it.
After all of the crucial components examined okay, I might presume that after the alternative of the faulty capacitors, I might instantly swap on the LCD Monitor with out connecting a light-weight bulb first. There isn't any crucial to attach the light bulb as a result of the ability facet elements were examined okay besides the fuse did not blow in the first place.
To your info, a lot of the capacitors used in the LCD power provide had been from the 105 diploma Celsius in order to last more and stand the heat produce by the ability supply itself. In case you change with an eighty five Celsius capacitor, it might not last long and will come back with capacitor problems again.
The Benq FP731 LCD Monitor problems was restored to normal operation after the eight filter capacitors was replaced. Capacitors breakdown was quite common in the LCD Monitor due to it compact design the place the heat have difficulty to transfer out due to the power supply board was coated by an aluminum shielding. Typically after few hours of operation, you could possibly feel the intense heat on the aluminum shielding and surrounding area. This can be a excellent news to us as an digital repairer as a result of an increasing number of LCD Monitor send in for repair because of capacitors faults only.
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