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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.

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6ya6ya
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Posted on Jan 02, 2017

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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

pravinbhavsa
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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 "

budmrtn
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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.
http://s807.photobucket.com/albums/yy352/budm/Viewsonic%20VG2021/

Posted on Jul 09, 2010

joecoolvette
  • 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.

Motherboard.

I don't doubt it.

Two common problems, all based on one issue.
Overheating.

1) Problem One;

Primer;
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,

http://en.wikipedia.org/wiki/Integrated_circuit

GPU,

http://en.wikipedia.org/wiki/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,

http://en.wikipedia.org/wiki/Ball_grid_array

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

http://en.wikipedia.org/wiki/Socket_478

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.
(Motherboard)

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,

http://www.youtube.com/watch?v=bnkQNmKauEc&feature=pyv&ad=5823851286&kw=DV9000

For additional questions please post in a Comment.

Regards,
joecoolvette

Posted on Nov 12, 2011

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1 Answer

Elite book 2640 blue light light on,yellow light flashing,screen blank


yellow light sounds like charge indication.If you press the power botton the fan should spin and you should be able to open the DVD by pressing the button on the tray.These are 1st steps to check motherboard function.If there is RAM installed remove battery after turning off power supply.Open memory door and reseat RAM.Replace cover then battery - power on.Any picture?Try an LCD monitor - no picture? Try different RAM or 1 stick at a time,remember to remove battery or RAM will be damaged.Still no picture - remove battery and try with AC adapter only.Still no picture - remove AC hold down power button for 30-sec plug in AC only and press power button.Still no picture - check CMOS battery if it uses a CR2032 button cell it may be flat.This can cause a no boot situation.If the CMOS has a plug or is soldered to the board that should be OK.The button cell may be hidden in the chassis anyway and to change it will require disassembly.So replace it when doing the cleaning.Still no picture - GPU is faulty.The unit should be disassembled and a reflow of GPU done,as well as cleaning all dust and fluff from the fan and other cooling system components.Airflow restriction of the cooling system is the cause of overheating and GPU issues.Google disassembly for your laptop and reflow method for GPU.If you have no experience with disassembly a step by step guide is crucial.Breaking parts is easy so extreme care is very important.

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1 Either the RAM slot is not working
2 or the RAM card(s) are not OK
3 or the RAMs are not compatable(not of the same specs)

Solution
1 Remove both the RAM cards, clean the metal joints in both the RAMs and the RAM slots
2 Remove power, remove all power source, remove power cables including all the battery
3 Keep presssing the power switch ON for a few mins, Do....ON... OFF, ON... OFF WITHOUT any POWER
4 Replace battery, power adaptor, power cables etc
5 Insert one of the RAMs in 1st RAM slot, power on, check if it's OK, Switch OFF, remove the RAM
6 Do the above process for the other RAM, now check if that works, use the same RAM slot
7 Now do the above two steps for the 2nd RAM slot

It will give you a rough idea of where is the issue.....either RAMs are not OK or the slots have issues or there is a compatibility issue among the RAM cards.....

Pls reply back and leave a feedback
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3. If not, then disassemble the laptop. Remove any components that attach to the laptop's motherboard first (e.g. battery, hard drive, RAM, wireless card, optical drive, ... etc.)
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6. Inspect the solder points connecting the DC jack to the motherboard. Make sure that none of them is loose. If any, re-solder them.
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6. Inspect the solder points connecting the DC jack to the motherboard. Make sure that none of them is loose. If any, re-solder them.
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1 Answer

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1 Answer

After i install the new motherboard, and i hit the power button, the screen monitor is not on and my heard the long beep sound from my motherboard. i check all the wire is ok but i dont know what wrong?...


You may need to try a few steps here,

1. Switch of you pc and open up you pc cover.

2. Pull out the memory (RAM) from the slot by pressing down the clipsfrom each edge, be gentle will you push down the clips from each side.Remember how it was seated when u pull out.

3. After that, put re-seat back the RAM back to the slot by pressing each edges in, firmly but not with excessive power.

4.Try to switch on the pc after you re-seated the RAM. If no success, youhv to repeat the procedure again, but this time clean the RAM's contactwith a cloth and contact cleaner, then re-seat it back and try again.

*here's the instruction with diagram to show you how to do it.

and video as well

5.If still no sign of success, you might have to unplug other cards, suchas your video card, and re-seat them back, then try again.

6. Worst case scenario, disassemble your motherboard and test it without fixing in the chasis by fising only your power supply, RAM, Video Card, Keyboard, and see if it works.



Good luck mate, comment here to let me know the progress or any success.

Do remember to rate my solution.. thanks (^_^)

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