Question about Dell E172FP 17" LCD Flat Panel Monitor

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C5707 available at?

Where would you get these from?

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From an old post (at Dell):
The TIP3055 handles about 70V and 10 Amps and is an NPN, so I decided to purchase four 2N3055 TO220.

from another one:
was able to successfully directly substitute MJE3055 NPN transistors for those on the original board

They are "equivalent", but (much) bigger: you must do some bending for them to fit inside the chassis

Ro

Posted on Oct 11, 2008

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Please tell me ,what is the c5707 equivlant


No really available other than the C5707 or 2SC5707. Where are you located?

Feb 19, 2012 | BenQ FP731 17" LCD Monitor

1 Answer

My monitor was just blinking folowing the thunderstom some days back and I tried to replace some 4 capacitors coded C5707,and it comes on but abnormal display and then the replaced transistors burn out...


At this point you may be better off to replace the whole board, the four C5707 are transistors, not capacitor. You need to make sure that there are no cold solder joints around inverter transformers lead, check the tuning caps in the inverter output sections.
Replacement board: http://www.lcdrepair.us

http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting

Failed TV and Monitors: http://s807.photobucket.com/home/budm/allalbums
http://en.wikipedia.org/wiki/Capacitor_plague

Oct 12, 2010 | Dell E173FP 17" LCD Monitor

2 Answers

Display not available after a few second....i already replaced tl1451acn inverter ic, back light , , ballast capacitor (replaced)...the only one not replaced yet is high voltage transformer (4 pcs), 2...


Replace the high voltage transformer. It is the ballast for the backlight.. If you could pinpoint the one that's overheating then that is the one that needs replacement. Much better if you will replace the four transformer...


Hope that answer your question..
Much appreciated if you could rate this help. thanks.

May 21, 2010 | Dell E176FPB 17" TFT LCD Flat Panel...

1 Answer

Picture goes black at random intervals


There are 4 c5707/5706 in the inverter transformer driving circuits, the cause of the problem was due to poor solder connection in the bias circuits of the transistors. Make sure to check that after you install the new transistors otherwise you will blowthem up. Common problem with this model. When the circuit drwas too much power from the power supply, it will shut itself off to ptotect itself.

Dec 16, 2009 | Dell E173FP 17" LCD Monitor

1 Answer

Benq t7q3


look at the 3 amp. fuse on the mainboard! By the way, you can buy very cheap USB light, wich are working with a small lighttube. Use the transistors of their generator!

Mar 09, 2009 | BenQ T705 17" LCD Monitor

2 Answers

Benq lcd c5707 transistor issues


You need transistors with hfe greater than 300. They are harder to get and you should use the producter`s original transistors 2sa5707.

Oct 18, 2008 | BenQ FP71G 17" LCD Monitor

1 Answer

Gone from blinkid led to lights out.


You really need to replace all 4 and also the 2 FU9024 chips and examine all the solder in the inverter area. Also if you have the 2 lamp connector board with a chungwa LCD panel them your lower lamp is probably also bad. Check out www.lcdrepair.us for instructional videos on Dell models as well as repair kits and boards for that unit.

Apr 25, 2008 | Dell E172FP 17" LCD Flat Panel Monitor

1 Answer

LED's blinking, no video


Your C5707 transistors in the monitor have failed. Suggest replacing all four with the Sanyo C5707 transistor. A common problem.

Dec 10, 2007 | Dell E173FP 17" LCD Monitor

10 Answers

BenQ FP731 Screen briefly displays then turns off


hi. i had the same problem and fixed it. the problem are the 4 transistors (C5707) one of more are shorted (Q739,Q740 and Q759, Q760). Also the fuse PF751 (3a) has to be replaced in most cases. In my case i replaced the fuse and 1 transistor (C5707)

Dec 06, 2006 | BenQ FP731 17" LCD Monitor

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