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I took my Msi ge 70 1757 apart to replace the charger pin. Unfortunately the pin failed several times. Long story short the last time I took it apart it had no power when I turned on the switch.

I disassembled all the cards. laptop about 5 years ram is seated OK I replaced the switch, still no power only the battery light on.

Posted by jim miers on


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SOURCE: I have a Heart Interface (Freedom 25) that has

Check your overload breaker. If it is tripped or bad you will not charge or invert power.

Posted on Dec 09, 2009



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SOURCE: 99 Jeep Cherokee Sport, 4.0L -won't start

you need to have it connected to an OBD2 machine and watch if you are missing the cam sensor showing RPMs
or if your missing crank sensors RPMs,
it could be a wiring problem or computer if your seeing the RPMs from both sensors,and the last thing i would check is hooking up a fuel gauge to the reed valve and watch what fuel pressure you have while cranking,if the cam sensor is the culprit it will turn the fuel off after the cranking.

Posted on Jan 12, 2010


pravin bhavsar

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SOURCE: hace a APC XS 900 that said battery needs

disconnect one terminal of the battery then measure charging voltage betwen +ve and -ve it should be 13.8vdc for one 12v battery if charging voltage is not present then battery is ok then connect ammeter to measure the current in Ampere .take care it should be in series if current if no current then battery must ok opern the ups there is a charger transformer measure i/p voltage to transformer if not present then check i/p path if present then check diodes at o/p of charger if faulty replace it also check capacitor and regulator ic if faulty replace it your problem must be solved

Posted on Mar 14, 2010

Testimonial: "There is no way to check the water in the batteries as thry are sealed. I found out that after a load is applied it goes on battery for a few seconds "


Bud Martin

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SOURCE: Viewsonic VG2021m does not work. I took it apart

I just work on one of this last wek with the same symptom, it turns out to be the logic board problem, not available any where.

Posted on Jul 09, 2010



  • 5660 Answers

SOURCE: Hp laptop... black screen... caps lock flashes 5

When the Caps Lock flashes, it is then being used in a diagnostic mode. 5 times flashing means a problem with the System Board.


I don't doubt it.

Two common problems, all based on one issue.

1) Problem One;

The Processor, and the GPU are the two hardware components that produce the most heat.

[ GPU = Graphics Processing Unit. Slang? Graphics chipset,

Chip and Chipset are slang terms for I.C.
Integrated Circuit,

GPU, ]

It could be something as simple as foam has melted, and melted down onto the motherboard, near the Processor socket. Removal puts the laptop back into service again.

It could be much more complicated, and follow an issue that has beleaguered the HP Pavilion dv2000 series, dv6000 series, and dv9000 series.

The cooling system for the GPU is inefficient. Allows the GPU to overheat.
Constant overheating partially melts the solder connections of the GPU to the motherboard.

The graphics chipset (GPU) is mounted to the motherboard with a BGA surface mount.
Ball Grid Array,

To explain the BGA surface mount;
Compare to an older Intel Pentium 4 processor, and it's Socket 478 processor socket,

The processor has contact pins on the bottom. (478 of 'em) These line up with matching socket holes in the Socket 478 processor socket. (478)

With a BGA surface mount there are no contact pins, nor socket holes.
Solder Balls take the place of the contact pins, and Copper Pads take the place of the socket holes.

The graphics chipset's Solder Balls, are lined up with the matching Copper Pads on the motherboard.
Heat is then applied at a specific temperature, and length of time.

This procedure melts the Solder Balls, and solders the graphics chipset to the Copper Pads.

With constant overheating the solder connections that were created, start to melt. This creates a poor connection.

The professional method to repair this problem, is to use a BGA Rework Machine, to Properly re-solder the connections.

Due to the location of repair shops that have a BGA Rework Machine, and the C-O-S-T, many are attempting to perform the procedure with a non-professional method.

A thin metal shield is cutout in the middle, for the graphics chipset. This shield is set over the graphics chipset, and lays on the motherboard. Heat is then kept just to the graphics chipset, and the other components on the motherboard are protected.

Heat is applied with a propane torch, or a hot air gun, (Not hair dryer), in a circular (Spiral), pattern to the graphics chipset. With a more proper method used, the tip of a thermometer that can read this heat range, is laid on the chipset, and is used to keep the chipset at a specific temperature.

(Too much heat will burn up the chipset. Too little will not properly remelt the solder connections. A Cold Solder joint, or joints, will result)

The heat from the heating instrument, (Propane Torch/Hot Air Gun), is rotated around in a spiral pattern on the chipset. Constant moving around to distribute the heat evenly.
(You do not want a 'hot spot')

When the specific heat range is met, the heating instrument is slowly moved away from the chipset.

Move up an inch or so, keep spiraling. Then move up another inch or so, and keep spiraling the heat source. Slowly move up in increments while spiraling. S-L-O-W-L-Y back away. Method is used so that the chipset slowly cools down. Otherwise a cold solder joint, or joints, could result.
(Right back to where you started)

This link is to a video that shows one style of the procedure. It is not an advertisement for the video, just linked for the procedure information,

For additional questions please post in a Comment.


Posted on Nov 12, 2011

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