1a.Take
of all non onboard device : processor ,
memory / SODIM , bloutooht , webcam , modem , wifi , card reader etc.
1b.processor/SODIM tested , SWITCH on again .
1c. physical analysis components : memory sockets loose ,
component crashes , burns , cracked , broken or any form of physical damage .(Make
a replacement if any).
1d.check procesor vccore
voltage ( schema apply ) via L / filter ( R36 , R45 , R56 ) / capacitor ( 330uf
- 220uF - Tokin nec super capacitor )
example ic / chip For cpu power is : ( schema languages : VCCORE / CORE CPU /
CPU DC / POWER processors )
Example
Vccore IC :
(ADP3166 ADP3170 ADP3421 AIC1567 CS5322 FAN5056 ITC1709
MAX1710/MAX1711/MAXl712 HIP6004 , ADP3212'MAX8760 , MAX8770 , MAX8771 , ISL6260
, ISL6265A , ISL6266A , ISL62882 , ISL6262A,ISL6218CV
- T , ISL6269CCR .. etc )
1e
: check for memory and power voltage conductors and ground socket interface
memory
Vccram usually require voltage 1.8 +(DDR2) or 1.5V(DDR3)(
plus sign indicates that it may be more than nominal voltage Similarly, the
measure vccore , the schema index view we can perform schema checking on orders
.examples
of memory / power SODIM ( schema languages : VDDR / POWER MEMORY / VTERM / DDR PWR )
ic
examples : (MAX8794
NCP5201 SC1486/SCl486A SC2616 TPS51020 ISL6520 ISL6537 CM8501 , ISL6224 ISL6225
, TPS51116EGR , RT8207A ... etc ) .
1f.cek voltage on S.I.O
/EMBEDDED CONTROLLER chip
S.I.O managed alot of signal,start from pwr button signal,switching VALW to
VS power and steping proces signal sleep state.We can detected normal ic and
firmware bios from confirmation signal of RSMRST#3.3V .If SPI setting ,IC bios
and firmware not working ,this S.I.O will not working.
This S.I.O programe by microcontroler .(download example S.I.O datasheet to get more information)
S.I.O chip samples are :
(WINBON/ENE/ITC/NOUVOTON/ PC97338 , PC87392 , FDC7N869 , FDC37N958 , LPC47N227 ,
LPC47N267 PC87591S / PC 87591L / PC 97317IBW/PC 87 393 VGJ PC87591E , WPC8768L
, KB926D etc ) .
1.g.check voltage and ground at the thermal sensor ic
Thermal
sensors ( heat sensor ) is a sensor chip that detects heat safe limits to
maintain security motherboar chips. almost all laptops have a thermal sensor to
microprocesor and some motherboards have a thermal Graphic chip to chip .
Thermal
sensor will give orders to the bios if it detects a maximum heat limit to
disconnect power to the processor or vga or just turn off bootstrapping (
command to boot ) and stop the interface between components that aims to keep
the excessive heat damage the chip ( protect error ) .
Detect
due to frequent excessive heat can cause thermal sensor or a faulty memory
detection and sensor commands do not get along ( Fals alarm ) . Thus the chip
detects heat tempratur maximum continuous conditions , although they are not.
To
reconcile the sensor detection is by lifting the chip from the motherboard and
put back to give the induction . if the sensor is already damaged and could not
be reset we will have to replace the sensor chip that is still accurate .
ic examples :
ADMI032
, EMC1402 , EMC4402 , EMC4401 , GMT781 , G768B , MAX6642 , MAX6657 , SMC1423 ..
etc
1.h.cek voltage
or frequency of the clock generator .
sample
clock generator chip :
ALPRS355B
MLF64PIN , CK505 , CK408 , K410M , CY2854LVXC , ICS9LPRS387 , ICS9LPR600
ICS951412
, ICS954213 , ICS9LPR363DGLF - T , ICS950810 , SLG8SP626 , SLG8SP513V ,
SLG8LP465VTR
SLG8SP553V , SLG8LP55VTR ,
SLG8SP513VTR ... etc.
2.preheting
on chip . ( Fixing ball lead / tin loose chip due to heat )
note
: Chip -level is not described in detail on the basis of the material .
sample chips :
-
SB/NB/ CHIP : - ( PC97338 , PC87392 , FDC7N869 , FDC37N958 , LPC47N227 ,
LPC47N267 PC87591S / PC 87591L / PC 97317IBW/PC 87 393 VGJ PC87591E etc. ) .
-
Graphics Brand : - ( ATI , NVIDIA , S3 , NEOMAGIC , TRIDENT , SMI , INTEL ,
FW82807 , and CH7001A , etc. .GPUCORE
/ GFXCORE / VCVOD / GRAPHIC POWER MAX8792ETD
+ T , MAX8792ETD , ISL6263 .. etc
