CARA MEMPERBAIKI asus x45ca n common laptop lvds problem by lanah
diposting oleh lanah komputer @ Oktober 19, 2015
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LANAH KOMPUTER
SERVIS CENTER LAPTOP MOTHERBOARD, CHIPSET LEVEL MOTHERBOARD REPAIR, PERBAIKAN MOTHERBOARD BANJARBARU, KALIMANTAN SELATAN SPESIALIS SERVIS LAPTOP MOTHERBOARD, PC MOTHERBOARD, VGA CARD, LCD PROJECTOR,PRINTER, PS 2, PS 3, PS4,PSP, XBOX 360 DENGAN BERBAGAI KERUSAKAN., ALAMAT 1 : https://maps.app.goo.gl/8vj1dEDSxPdfaEXR8 map Lanah Komputer. jl. unlam 1/2/3 sumbersari no 41 kelurahan sei besar, kec banjarbaru selata, belakang kampus unlam banjarbaru kalimantan selatan hp 082190204575
Senin, 19 Oktober 2015
CARA MEMPERBAIKI LAPTOP acer 4752, 4750,4352, JE40HR BATTERY LED IS BLINKING BLUE CONTINOUSLY
diposting oleh lanah komputer @ Oktober 19, 2015
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ASUS a43e k43E mb k43sd ref20 dead and no display
diposting oleh lanah komputer @ Oktober 19, 2015
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Jumat, 31 Juli 2015
KERUSAKAN UMUM PADA LAPTOP MOTHERBOARD
n this post I will summarize most common laptop hardware related problems and give some suggestions how to troubleshoot or repair them.
Problem 1.
Computer doesn’t turn on at all.
When you plug the AC adapter into the laptop, there are no lights turning on at all. When you push on the power button, nothing happens. The laptop appears to be completely dead, makes no sounds, no indications of life.
Possible problem:
– The AC adapter failed and the battery has no charge left. In this case test the AC adapter with a voltmeter. If it’s dead, replace it with a new one.
– DC jack failed and the motherboard doesn’t receive any power from the adapter. In this case the DC jack has to be replaced.
– Motherboard failed. The motherboard has to be replaced, if it’s not too expensive. Otherwise get ready to buy a new computer.
Here are some tips for testing AC adapter and DC jack.
Also, make sure to read step-by-step instructions for troubleshooting dead laptops.
Problem 2.
Screen is blank.
The laptop turns on, power LED lights up, cooling fan works but nothing appears on the screen. The screen is completely black and blank. There is no image on the screen at all.
Possible problem:
– This can be memory failure. It’s possible one of the memory modules failed. In this case you can try reseating memory modules to make sure they are making good contact with the slot. You can try removing memory modules one by one and test the laptop with only one module installed. You can try replacing memory modules.
– If reseating/replacing memory doesn’t help, try removing the hard drive, DVD drive, modem, wireless card, keyboard, etc… In other words, disassemble the laptop to bare minimum and test again. If the laptop still doesn’t turn on, most likely you have failed motherboard or processor.
Read this guide for bare bone system troubleshooting.
Problem 3.
Laptop turns on and off repeatedly.
The laptop turn on without showing any image on the screen. After a few seconds it turns off by itself. Then it turns on and off again.
Possible problem:
Most likely this is motherboard failure. You can try reseating/replacing memory as I described in the Problem 2. If it doesn’t help, probably the motherboard failed.
Problem 4.
Laptop makes noise while running.
The laptop turns on and everything works fine, except it makes some constant weird grinding or rattling noise.
Possible problem:
In most cases this noise is coming from the cooling fan or hard drive. Take a closer look at the cooling fan.
If the fan doesn’t spin but the the laptop makes noise, probably it’s coming from the hard drive. Back up all personal data as soon as possible and replace the hard drive.
Also, you can remove the hard drive and stat the laptop. If the laptop still makes noise, most likely it’s bad fan.
Problem 5.
Laptop shuts down or freezes.
The laptop runs properly but after a while it freezes or shuts down without any warning. When it happens, the bottom feels hot. Also, the cooling fan runs louder than usual.
Possible problem:
Most likely this is heat related issue. It happens because the fan heat sink is clogged with dust and the processor not cooling down properly. Cleaning the fan and heat sink from dust should fix it.
Here’s how you fix heat related problems.
Problem 6.
Battery not charging properly.
The battery stopped charging properly. It doesn’t charge at all or charges only after you adjust the position of AC adapter plug inside the power connector.
Possible problem:
– Failed battery. If it doesn’t charge completely try reconnecting the battery first. Also, try running the laptop just from AC adapter with battery removed. If it runs fine from AC adapter, most likely it’s either bad battery or failed motherboard. Try replacing the battery first.
– Failed DC power connector. If the battery charges only after you adjust the position of AC adapter tip inside the connector, most likely this the DC jack failed.
Here are some tips for charging problems.
Problem 7.
Screen light fails.
The laptop starts properly but after a while the screen light turns off. The image still appears on the screen but it’s very dark.
In some cases the screen light never starts and all you can see is a very faint image.
Possible problem:
Most likely it’s either failed screen inverter or backlight lamp (CCFL) failure. When either one fail, the backlight stops working.
In order to troubleshoot this, you’ll need some spare parts: either new working inverter or known good backlight lamp.
Read how to troubleshoot backlight failure.
Problem 8.
Strange or garbled image on the screen.
The laptop turns on properly but has a distorted or garbled image on the screen.
Possible problem:
– The graphics card failed. First of all, test your laptop with an external monitor or TV. If you see the same garbled image on the external screen, most likely the graphics card failed.
– If the problem appears only on the laptop screen, this can be related to one of the following: poor connection between the video cable and motherboard or screen. Also can be failed video cable or screen.
Here are examples of failed video and explanations how to narrow down the problem.
Also read why display shows strange colors.
Problem 9.
Some keyboard keys stopped working.
Some keyboard keys do not work at all or type wrong characters.
Possible problem:
Most likely the keyboard failed and they are not repairable. Read how to replace the keyboard.
Problem 10.
Keyboard has missing or broken keys.
A key got separated from the laptop keyboard.
Problem solution:
If a key separated from the keyboard, it’s still possible to fix it.
If you have many keys missing, probably it makes sense to replace the whole keyboard.
Read how to attach a key back .
Problem 11.
Repetitive beep sound on startup.
You turn on the laptop but there is no video on the screen. Instead, it starts making repetitive beeping sound. In some cases you can “fix” the problem temporarily if you press on the keyboard keys.
Problem solution:
Most likely you have stuck keys. In this case you’ll have to replace the keyboard.
Problem 12.
Liquid spill.
You spilled something on the laptop and it’s stopped working.
Problem solution:
Liquid spills are very dangerous and unpredictable. If it happened, turn off the laptop ASAP, remove the battery and do not use it until all internal parts are inspected for liquid damage.
It’s sill possible to make it work again.
diposting oleh lanah komputer @ Juli 31, 2015
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LAPTOP HP MATI TOTAL, 5V 3V HILANG(HP G6000 / V6000 FIXING GUIDE)
The machine has been water damaged.
It does not have system standby power, which are 3V and 5V.
Check Max8724(the battery charging chip) first, because to make system has standby power this chip must work correctly. This is a 28 pin chip, we only need to test 1, 2, 4, 8, 10, 11 pin. They are VIN(main power for chip), LDO(provide 3.3V for chip itself in order to set REF voltage, also provide signal to drive 2 MOS to charge battery), REF(set reference voltage of the chip), SHDN#(enable/disable chip, a switch), ACIN(indicate the power supply has plugged in), ACOK#(power adaptor ok with mainboard).
Everything ok except 10 pin, ACIN is 0V. This is incorrect, mainboard doesn’t detect there is an adaptor! Trace it backward and find it is very simple – mainboard use 2 resistors to pull the input voltage(19V, directly from dc socket) down to about 4V, so test the first resistor and find it opened. Change it and 3V/5V power come up and mainboard be able to switch on.
Then the trouble start when I try to charge the battery. The charging current never go beyond 0.15A and after 10 seconds the charging light start to flashing. Also can’t switch on from battery. First, change Max8724, still same problem. Next check all the resistors around max8724 and change it if it has any sign of watering, still no good. Then change KB3926(EC/KBC, chip monitors the statue of battery), still same. This is the fault that I never dealt with before.
Decide to check MBDATA and MBCLCK, 2 signals that send battery information from battery to KB3926 before I give up. I find the MBDATA is short!
Finally, find there are 2 pins stick together on CN10(the connector of multimedia switch board). Fix it and it start to charging battery. Switch on with power adaptor, ok. Remove the power adaptor once switch on, battery keep the mainboard running, ok. But still can’t switch on from battery once remove the power adaptor. Think, think, do I miss something here or there? Oh, the CMOS battery not installed, put the CMOS battery back and everything work perfectly. The battery part of troubleshooting takes me about 3 hours.
Remember, system may not run if you don’t have CMOS battery or CMOS battery is low for some AMD cpu mainboard.
diposting oleh lanah komputer @ Juli 31, 2015
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Rabu, 17 Juni 2015
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