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No power to the front light display of the recorder.but there is a small mother of pearl electrical effect on the underneath of the circuit board at the solder joints of a small capacitor

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I have a GPX model 808 portable dvd player that seems to have a broken charging jack on the unit and no led comes on when attemting to charge.

Posted on Mar 25, 2009

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Posted on Jan 02, 2017

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My acer aspire z3100 all in one has a black screen when powering it on, already changed the mother board and battery,when turning on you can hear the fans and the blue led light for power on


I understand why, for space-saving reasons, some people choose to purchase an all-in-one computing device. The inevitable downside is that when the display fails long before the device itself is obsolete, then you are stuck with no options. Chances are that the back light circuit or the LCD panel itself has failed here. Repair of a unit of this age is not cost effective. Replacement is the better option.

Dec 15, 2015 | Acer Aspire Z3100 (2771498) 21.5 in. PC...

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Sharp Mx-M453u......No display No power on panel display,but Mother board,MFP board light on and cooling fan running


Check the power supply for the presence of all the voltages it supplies to the other circuit boards.

Nov 15, 2015 | Sharp Mx-M453u mx-M453u

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Display light board faded


Four years ago I had this problem (display goes dim, then goes out altogether) and fixed it per this post:
The circuit board for the display/touch panel is mounted on the back of the display panel itself and connected to the other circuit boards by two multipin connectors. When you remove the display panel (3 screws on top, 4 on the bottom) you will be able to GENTLY detach those connectors. They are low voltage and may be handled safety even when the oven is powered, but I agree that turning off the oven circuit breaker is good practice.

To remove the circuit board, GENTLY release the two black plastic tabs; the solder pads are underneath. I too used a 100 mf capacitor because no local supplier had a 68 mf hi-temp. Observe polarity; the (-) lead goes towards the center of the board (away from the edge connector.) You must use a high-temperature capacitor (105 degrees C, I think) or the problem will recur.

If your oven isn't put together the way mine is, this solution won't work - and I'm sorry to have taken your time.

Sep 16, 2013 | Jenn-Air W30400P Stainless Steel Electric...

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I have XPS M1530 DELL Laptop. DC JACK(power charging port has broken from mother with a very small piece of mother board)....I had tried to call customer care ..he told you should change the motherboard...


If this motherboard is a multi-layer motherboard then it is impossible to repair.
You can try to repair the motherboard by glueing the broken piece onto the motherboard with epoxy glue. Then identify the broken power circuit tracks between both parts of the circuit board, and then solder wires across these tracks or to the closest solder connections to re-establish the electrical connections on the motherboard.
If this does not fix the problem then most likely it is a multi-layer motherboard and you cannot bridge the internal connection inside the motherboard.

Jun 22, 2011 | Dell XPS M1530 Laptop

2 Answers

My screen monitor flickers almost every second.what should i do?it is very disturbing.


There can be fault in the inverter drive, the back light circuit or the main power board.
You will need to open the mother board and check on all leads on the mother board- use a magnification observing lens.
Tighten all connectors and solder suspected joints. Check with an external display to confirm the display circuit and then pin point to the display unit in detail of the drive section.

Apr 21, 2011 | Dell Inspiron 1420 Notebook

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Handset shows no display. Our blackberry pearl handset 8120 has stopped displaying anything after it was accidentally dropped from the pocket.


is it new?, if it is take it send it back to blackberry and get them to fit it for a small fee, or if it is old find a way to open the cover and check for damages in: the circuit board, any wiring and the screen (back and front).

Jan 27, 2010 | RIM BlackBerry Pearl 8100

2 Answers

LG Washer wont start, no power


Make sure there's power getting to the washer. Check for a tripped circuit breaker or a blown fuse. Check the wall socket for power. Sometimes the power cord disconnects at the washer, if this is the case, the wiring must be repaired or replaced.

Jun 21, 2009 | LG WM-2277HW Front Load Washer

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Dim light on oven display w30400b jennair


The circuit board is for the display/touch panel. It is mounted on the back of the display panel itself and connected to the other circuit boards by two multipin connectors. When you remove the display panel (3 screws on top, 4 on the bottom) you will be able to GENTLY detach those connectors. They are low voltage and may be handled safety even when the oven is powered, but I agree that turning off the oven circuit breaker is good practice.

To remove the circuit board, GENTLY release the two black plastic tabs; the solder pads are underneath. I too used a 100 mf capacitor because no local supplier had a 68 mf hi-temp. Observe polarity; the (-) lead goes towards the center of the board (away from the edge connector.)

BTW, I had exactly the same symptoms (display goes dim, then goes out altogether.)

Jan 16, 2009 | Jenn-Air W30400P Stainless Steel Electric...

1 Answer

Dell Dimension 4600C will not power up


Sounds like the power supply is faulting. If not it is your mother board that has failed.

Mar 06, 2008 | Dell Dimension™ 4600C PC Desktop

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