Standard procedure checking motherboard problem

No flame 1.LED display

Procedure:

POWER DRAIN (CLEAR INDUCTION POWER AND THROW)

-Power drain (vacate power) reset thermal heat sensors, dispose

Induced release battery without the power adapter for 20-30

Seconds later press and turn the laptop back.If Turn off yourself to

protect the hardware, then after the drain then the laptop will return

to normal. -Turn on the Laptop using the battery and the

adapter / turn on just use the battery and turn on using only

the adapter. BIOS CHECKING (netbook only) Turn off netbook,

press fn + esc for acer.window + B for Hp / compaq.ctrl + alt + u for

toshiba. Then hold down the power button for 20-30 seconds if the

power flashing lamp, you should do bios updated. Type = 1

PHASE PROCEDURE "WARNING" Before doing Stages

Procedure first read the material Things that should not be done in

Motherboard repair on the link below:

Release all non onboard devices: procesor, memory /

sodium, Bluetooth, modem, wifi. 1b. Replace processor, the memory

turns back on. 1c. Physical analysis of components: loose memory

sockets, crash components, burns, cracks, breaks or any form of

physical damage. 1d.check the vcccore voltage for the

processor (schema applay) via L / filter (R36, R45, R56) /

capacitor (330uf-220uf-nec tokin super capacitor) example ic / chip

for power cpu is : (schema language: VCCORE / CPU CORE /

CPU DC / POWER PROCESSOR) Analytical method: Prepare

schema open index schema Notice the schema layout for vccore

on any page on the page. On that page can be known type, ic

code, code Location of the chip on the motherboard in question ...

Note the vin (power in or supply power for vccore) make sure the

required voltage is in line with the schema request. If vin is there

but vout (power out) does not exist then certainly chip does not

work properly. General layout power processor:




For those who do not know how to measure , can see how the

measurement on the link below:

Physical form, drawing, component character below at the link

below: check The power voltage

for the memory and the interface conductors and the ground

socket Vccram memory typically requires a voltage of 1.8+ (the

plus sign indicates that the voltage may be more than the nominal

written. Example: 1.8 + = more than 1.8v) Similarly, measuring

vccore, by looking at the schema Index we can check based on

schema command. example memory / sodim power (schema

language: VDDR / POWER MEMORY / VTERM / DDR PWR) ic

example: (MAX8794 NCP5201 SC1486 / SC2616 TPS51020

SCl486A CM8501 ISL6520 ISL6537, ISL6224 ISL6225,

TPS51116EGR, RT8207A ... etc). For Power Search / a component

that supplies power for memory requires supportive knowledge.

See details on the link below:

How to read schematics on links Below:

Code type and Component location on the motherboard

and terms in the scheme at the link below:

1f. Voltage check on IO EMBEDDED

CONTROLLER chip IO chip example is: (PC97338, PC87392,

FDC7N869, FDC37N958, LPC47N227, LPC47N267 PC87591S /

PC 87591L / PC 97317IBW / PC 87393 VGJ PC87591E,

WPC8768L, KB926Ddll). 1.g. Check the voltage and ground on the

thermal sensor ic Thermal sensor (sensor heat) is a sensor chip

that detects the safe hot boundaries to maintain the security of

chips.all almost all motherboard laptops have thermal sensors for

microprocessor and some motherboards have thermal chip for

Graphic chip. The thermal sensor will command bios if it detects

the maximum heat limit to disconnect power to the processor or

vga or simply shut down the bootstrap (command for booting) and

stop the interface between components aimed at keeping the

excessive heat from damaging the chip (protect error). As a result

of frequent detection of excessive heat can cause the thermal

sensor is damaged or memory detection and the sensor

commands are not false (false alarm). So the chip detects the

maximum heat temperature continuously even though the actual

condition is not so. To reconcile back is to lift detection sensor

chip on the motherboard and reattach to release induction

While or if the sensor is already damaged and can not be

reset we will have to replace the sensor chip that is still accurate. ic

example: ADMI032, EMC1402, EMC4402, EMC4401, GMT781,

G768B, MAX6642, MAX6657, SMC1423..dll Here's how to

measure and analyze the thermal sensor ic:




theater 1.h.check voltage or frequency of the clock generator.

Example clock chip generator: ALPRS355B MLF64PIN, CK505,

CK408, K410M, CY2854LVXC, ICS9LPRS387, ICS9LPR600

ICS951412, ICS954213, ICS9LPR363DGLF-T, ICS950810,

SLG8SP626, SLG8SP513V, SLG8LP465VTR SLG8SP553V,

SLG8LP55VTR, SLG8SP513VTR ... etc How to measure

Frequency with oscilloscope can be seen at link below:

Recognize how the oscillator on

the link below:

2.Do a queue on the chip. (fixing lead Ball /

loose tin chip due to overheating) note: Chip level is not

explained in detail on the basic material. sample chips: -IO

CHIP: - (PC97338, PC87392, FDC7N869, FDC37N958,

LPC47N227, LPC47N267 PC87591S / PC 87591L / PC 97317IBW

/ PC 87 393 VGJ PC87591E etc.).