Question about Dell STUDIO ONE 1909 ALL IN ONE CORE 2 DUO 2.93Ghz 320GB 4GB DVDRW 18.5"
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Posted on Jan 02, 2017
Repairing the DELL E171Fpc LCD Monitor with the complaint of display shutdown after few seconds (power LED still on) was not difficult. Normally when this type of problem happens, we would first suspect the inverter board, then the filter capacitors and lastly the main board. A defective in one of the lamps and a faulty TL1451AC PWM IC or inverter ic may caused the display to shutdown as well. If the lamp is defective, it will send a feedback to pin 3 or 14 of TL1451AC IC and caused it to stop producing output signal thus the display just shut off once you switch it on.
Posted on Jun 02, 2007
SOURCE: problem in monitor
you need to either buy a new inverter board, or if you are competant with soldering onto boards, you need to replace the c5707 transisters at points q740, q739, q760 and q759 on the larger board. best place really for the replacement c5707s is ebay
Posted on Aug 27, 2007
try one thing this will tell you if there is a problem with the monitor or the system
start the system and go in to bios and than check out if u still loose display
and if yes than when u loose display disconnect the data cable of the monitor from the system and chk out if u see the self test on the monitor or not
the self test if the colour patern if u see that its nothing wrong with the monitor its ur system
if u do not see the colour patern ... monitor bad
if the colour patern is seen reseat the cpu heatsink , remove the display card (if any add on display card ) and reseat the memory cards
and if that doesnt work remove all the add on cards and than start the system on the onboard display
and than put the cards one by one u will get the culprit
Posted on Nov 20, 2008
SOURCE: Screen goes blank
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Cause of power going
off: There is a bad 1000uF, 16V cap
on the power supply board.
Solution: Replace cap. Radio Shack sells a 1000uF, 35V cap for $2. This will work.
Why did the cap go bad? The cap is too close to a heat sink and over heated.
What does this cap do? This cap sends a signal to an IC which keeps the monitor 'on' after the power switch is pushed. When the cap is weak, AC ripple voltage is applied to the IC and it sends a signal to shut the monitor off.
Opening the Monitor: These monitors are difficult to open.
The two plastic pieces snap together and must be pried apart with a flat screw driver.
After removing the stand, you need to insert a flat screw driver at the bottom of the screen where two slots are located. Then work the screw driver around until the two plastic pieces are separated.
Remove the cover plate and unscrew the push button circuit board.
Unplug the monitor cords from the driver board and remove the screen.
Unscrew the mounting screws from the power supply board and remove.
You will need to pinch the plastic support in the middle of the board to remove.
Cap is located near a copper heat sink and the value will be on the side of the cap. It will be bulged up on the top. You will see burn marks on the board surrounding the cap. Unsolder the cap.
Install the new cap and solder. Make sure you connect + of the cap to + marked on the board.
Be careful not to solder across joints.
Keep leads long so you can bend the cap as far away from the heat sink as possible.
Reassemble monitor and turn on.
This should solve the problem.
Posted on Jan 01, 2009
SOURCE: Dell E173FP 17" Flat Panel
you are seeing a common problem there are 4 transistors that switch off the power to the back light most of the time these are not bad but the solder joints have cracked causing a bad connection and simply resolder these will fix the problem.But there are also a problem with bad caps in these monitors it is ez to see them cause the top of the bad cap will be bulging up I have seen 100s of these monitor fixed with just resoldering the connection in the power board which is also the back light board.any flicker in voltage in this circuit will cause the power to the pack lights to shut down.
Posted on Jun 10, 2009
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