ene kb9012 programmable
ene kb9016 programmable
ene kb9018 programmable
ene kb9022 programmable
ene kb9028qc programmable
ene kb9010 programmable
ene kb3930qf/b1 programmable
ite it8585e programmable
ite it8586e programmable
ite it8985e programmable
ite it8518 non programmable
ite it8517 non programmable
ite it8572 non programmable
ite IT8528E non programmable
ene KB926QF C0 non programmable
ene kb3926qf non programmable
ene kb930QP A1 non programmable
ene kb910 non programmable
SMSC kbc1126-nu non programmable
SMSC MEC1322-NU non programmable
nuvoton NPCE985PA0DX non programmable
nuvoton npce285ua0dx non programmable
RSMRST#
When the Power,Bios,Ec are OK, the RSMRST# will go Hi. In the other word,this pin go Low only when the systemreset.If BIOSdata is error,RSMRST# wont go HI.
When SIO(EC) get +V_RTC
the crystal will work.
1. RTC have to be oscillating(32.768KHz).
2. RTCRST# have to be high.
3. RSMRST# have to be inactive (high).
4. PWRBTN# have a trigger.
5. LOW_BAT# have to be inactive (high).
If this 5 present, then EC will recieve SLP_S3# / SLP_S5 from ICH/PCH, in the old ICH or some deferent circuirity SLP_S3 and SLP_S5 will generate directly from ICH,or both EC and PCH having this signal also.
When All+V?S/+V? powers are ready, PWR_GOOD will tie to high to turn on CPU powers(+VCCP and +VCC_CORE).
Service log is made by technicians to make a record of faulty motherboard electricity and signal system , every single voltage and signal measurement are notice in this log.To narrow the search of missing voltage and signal,divide by checking symptom of faulty to be :
1.Dead motherboard
No led indicator at all
No fan moving
No power
This motherboard require an adapter voltage
(12V_15V_16V_18.5V_19V_20V) also 3V and 5V to completely VALW power supply
need.without this impossible motherboard to a life.
Starting with checking power jack to ensure adapter continuity supply P channel mosfet
transistor(adp fet's) ended to P channel mosfet transistor for battery fet.
This line power contribution called Main circuit line of VALW power supply.Open schematic (ensure match motherboard and schematic code)for charger IC page and trace started from DC jack to adp P channel mosfet (or same motherboard using Inductor or Diodes to replace transistor on circuit) make sure continuity supply for charger IC VCC,DC/DC main supply IC VCC and each Upper N channel SOURCE to produced 3V and 5VALW.
Signal confirmation EC Bios working name is RSMRST# for 3.3V
2. No display motherboard
led indicator on,
switch on but no internal or external display.
There are 3 boot strap device supported to make motherboard load to display of course after Bios system working properly :
A.Processor
Without this motherboard will not be able to display. power name by VCCORE and enable signal called VR_ON or V_RON as a trigger from Embedded controler(EC) to enable or disable VCCORE IC.Processor need power supply greater than 1.05V but some AMD processor only need power greater than 0.9V.
B.SODIM
Sodim power called VCCRAM.There are 2 VCCRAM need to make sodim working :1.5V and 0.9VTT for DDRIII and 1.8V_0,75VTT for DDRII.Get the schematic and find VCCRAM/VTT measuring point to ensure sodim powered well.
C.CHIP'S (SB/NB/VGA)
Chip Power called VCCP. There are very complex power supply system. Chip need 19VALW- 5/3VALW-5/3VS-1.2VS-1.05VS. Chip also have they own RAM and need power supply to working. Finding measuring point on chip by opening chip page on schematic or by checking Voltage rail for specific motherboard. Signal confirmation chip was ok on chip PWRGOOD for 3.3V or tolerance 10% Note every missing power and replace damage component.
3.Power Drop
Led Indicator on
Switching on
on for few second after that back off.
This symptom happen because power spike or there is shortage on VS line. Processor and Chip are most which can cause power spike,look at VCORE and VCCP circuit line ,circuit has provide stockpile empty pad to add some more capacitor to anticipate power spike during boot up process. The other problem of power drop are some shorted on VS line ,so after switch on VS active 1 or more VS line got a feed back caused power down and shutdown the system.
4.VALW SHORTED
Adapter led Blinking or drop
Current high Voltage down
no movement at all(Dead shorted motherboard)
This feed back comes from VALW main power supply line.Checking this on schematic by opening Charger IC page and trace any sorted component on VIN and VBAT+line.Finding shorted by checking all component having Cathoda and anoda .this are most potential component conduce shorted.
5.No switch/Can not Switch on
there are few system switch found for different circuit manufacture.
measurung switch voltage on one of switch button pin
before switch standby power available for 17~19V comes from 51_ON#and after switch on power switching vcc 3.3V replace 51_ON# supply than EC_ON# one of pin Embedded controller reacted for on/off mode.
Switching system shorted power switch to the ground,while shorted vcc become zero volt than 3,3V_vcc replace 51_ON# 17-19V become 3.3V.this signal read by Embedded controller to switch on or switch off the system.
The other system used 3 or 5V switch button VCC.this system using curve signal reading when 3or5V shorted to the ground by switching button ,3V will drop to zero volt(for 1 second) EC will reacted to power on the system and when 3or5V shorted for more than 3 second ,EC will reacted to power off the system.
Make sure this system running properly beside checking for spi flash running on this EC and EC powered well.
Can not switch also will happen if NBPWR_BTN# or what ever pin called.if this signal missing event all system above checked well,the switching power on system will not work.
Laptop requirements in order to switch on first are the availability of 3V and 5VALW. Careful when finding 5VALW missing, switched on first cause of several motherboard, 5VALW appear after switch on .Than 3V_ALW or 3VPCU provide power supply to the EC , BIOS IC , South Bridge ( SB ) , clock generator and oscylator on ALW voltage .
VSB or switch voltage button (3.3V) will appear after Bios and EC powered. some of laptop motherboard will found 17V switch voltage on one of pin switch button but after switch -on voltage is changed to be 3.3 V.This is normal. Press power button ( short to ground ) then 3.3VSB will turn into 0V and back to 3.3V.and if standby VSB 17V press power button VSB become 0V and back to 3.3V. than power button is a good sign . steps further is the signal being sent to the EC ( Embedded controller NPCE 885LAODX ) signal names is NBSWON # most other brands of EC signal name may SW_ON, EC_ON or whatever name of the signal as long as signal coming from SW1 sent to EC , this voltage must respond in the same manner of testing power button , BIOS IC and firmware connected to SPI interface to the EC .Signal confirmation to ensure EC BIOS working properly is RSMRST # for3.3V.RSMRST# signal sometimes appear after switch on and other motherboard without switch on 3.3 V already present .Modern Motherboard has 2 or 3 IC BIOS. Identified EC BIOS which is usually one-page schema with EC names EC BIOS.
Other important signal from EC is DNBSWON # ,this is PWR_BTN signal to switch on South bridge sent by the EC after receiving NBSWON # signal from power button . DNBSWON # 3.3V must be present otherwise it would not switch on , after this signal appears then the SB will sent SUSCLK # signal back to the EC and turn on VS as trigger for all switching gate driver as VR_ON , Suson , MAINON , S5_ON or SLP_S3 , SLP_S4 and SLP_S5 . and for all the Vs voltage to the Device .
What is White Display?
Ans: LED Gold LCD is glowing means back bed is working fine but it is called 3Volts called VCC_lcd or say energy from Motherboard.
Possible reason: Cable may damage, laptop motherboard not sending to Screen pcb or screen pcb is faulty may be open on screen pcb.
solutions:
1. Open the Screen from its cover the cable to the screen and motherboard after checking cable physically. Check the 3volts supply on screen first if its present then screen pcb is faulty need to replace
2. If your cable is not present then check the cable connectivity with motherboard JP24 pin No.38 & 40 if your cable is so faulty so replace the cable.
3. If it is not present at CN24 Pin 38 & 40 or L21 then return to Q3 mosfet which is working as switch P type mosfet switching or not may faulty. if faulty replace it. if still not lcd_vcc / lcdvdd please follow the signal responsible for switching along with Q29 in their case.
What is Windows 10 S and how is it different from regular Windows 10?
Microsoft launched Windows 10 S, a brand new version of its ubiquitous operating system that will come with many new PCs in the near future. But what is it, how much does it cost and how is it different to Windows 10 Home or Pro? What is it?
Windows 10 S is a fully-fledged version of Windows 10 designed for low-cost computers as well as education-oriented PCs and even some premium computers, such as the new Microsoft Surface Laptop.
What does the ‘S’ stand for?
According to Microsoft the “S” doesn’t stand for anything in particular, but the company says Windows 10 S is streamlined for simplicity, security and speed. Windows 10 S will boot 15 seconds faster than a comparable machine running Windows 10 Pro with the same profile and apps installed, and it will run as fast on day 1,000 as it does on day one, Microsoft says.
How is it different from Windows 10 Home or Pro?
The big difference between Windows 10 S and any other version of Windows 10 is that 10 S can only run applications downloaded from the Windows Store. Every other version of Windows 10 has the option to install applications from third-party sites and stores, as has the majority of versions of Windows before it.
Windows 10 S will also come with Microsoft’s BitLocker encryption system for securing your files in case of theft, which some versions of Windows 10 Home do not have available. It will also receive the same updates at the same time as other versions of Windows 10.
Which apps will run on Windows 10 S?
Anything downloaded from the Microsoft Windows Store will run on Windows 10 S, which has thousands of applications available, including free, paid and trial versions of software. That will soon include the full Microsoft Office suite and Spotify, while Slack, Evernote, Netflix, Facebook, Adobe Photoshop Elements and many others are already available.
Which apps won’t Windows 10 S be able to run?
Any apps that are not currently available in the Windows Store will not be able to be installed or run. That includes Apple’s iTunes, Google’s Chrome browser and the full versions of Adobe’s Acrobat, Photoshop and the rest of the Creative Suite – or anything else that’s installed via the traditional Windows 7 or earlier way.
Can I play games on Windows 10 S?
Yes and no. You can play any game that can be installed from the Windows Store, which includes both mobile games and AAA games – mainly from Microsoft’s game studios – such as Forza Horizon 3 and Gears of War 4, plus Call of Duty: Infinite Warfare.
You will not be able install Valve’s Steam store, EA’s Origin, Blizzard’s Battlenet or any game distributed on disc or download from outside the Windows Store, however, which will severely limit the selection of games available for Windows 10 S.
Which browser will it run?
Windows 10 S will be limited to Microsoft’s Edge browser until other browser makers, including Firefox, Opera and Google make their browsers available through the Windows Store. While Microsoft says it will not stop them adding their web browsers to the Windows Store, it is not known if or when Google and others will do so.
How do I get it?
Windows 10 S will only be available on new machines for the foreseeable future, and won’t be available as a separate version of Windows users can upgrade with or install as with Windows 10 Pro.
When can I get it?
One of the first PCs to ship with Windows 10 S installed will be the new Microsoft Surface Laptop, which will ship to customers in the US on 15 June. Windows 10 S will see wider availability this summer.
How much will a Windows 10 S PC cost?
Machines running Windows 10 S will be available from a variety of Microsoft’s PC-making partners, with Acer, Asus, Dell, Fujitsu, HP, Samsung and Toshiba all producing machines, starting at $189 in the US.
What if I have Windows 10 S and need to run apps outside of the Windows Store?
Any Windows 10 S machine can be upgraded to Windows 10 Pro for a one-time fee of $49. Some machines, such as Microsoft’s Surface Laptop, will also come with a free upgrade to Windows 10 Pro for a limited period.
Once upgraded to Windows 10 Pro, it is not possible to revert back to Windows 10 S.
How does it compare to Google’s Chromebooks?
Windows 10 S is Microsoft’s answer to the success of Google’s Chromebooks in the education sector. Chromebooks are affordable laptops that run Google’s Chrome OS, which is an operating system built around the search company’s Chrome browser and is limited to web apps and some Android apps.
Windows 10 S, while aimed at the same market, is a fully-fledged version of Windows that is limited to apps from the Windows Store, but can accept and use any peripherals or other devices that any other Windows computer can. That should make Windows 10 S much more capable than Chrome OS, but it remains to be seen how well Windows 10 S runs on the cheapest of machines – something at which Chrome OS excels.
How is it different from Windows RT?
This isn’t the first time Microsoft has attempted to make a version of Windows that is locked down to just apps from the Windows Store. Windows RT launched in 2012 as a version of Windows 8 that could only run apps from the Windows Store and came on the first Microsoft Surface tablet.
Windows RT was limited to Windows Store apps because it ran on ARM-based processors, similar to those found in most smartphones, not x86 processors such as those found in most desktop and laptop computers. It was phased out within a couple of years.
Windows 10 S is locked down not for hardware reasons but for security, speed and efficiency, which Microsoft hopes will help it succeed in the key education market.
S1 - Stand By (Power On Suspend) - no system context is lost
S2 - Stand By - CPU and system cache context is lost S3 - Stand By (Suspend to Ram) - system memory context is maintained, all other system context is lost S4 - Hibernate - Platform context is maintained. States S1, S2, and S3 are all various aspects of the Sleep function. If you are running an incompatible video card, some or all of these states will be unavailable. S1: the most power-hungry of sleep-modes. All processor caches are flushed, and the CPU(s) stop executing instructions. Power to the CPU and RAM is maintained, Basically old machines are more likely to support S1.
S2: The CPU is powered off, this state is rather less found.
S3:In this state, RAM is still powered, although it is almost the only component that is. Since the state of the operating system and all applications, open documents, etc. lies all in main memory, the users can resume work exactly where they left. The computer is faster to resume than to reboot, secondly if any running applications have information this will not be written to the disk, This state is comparatively more common.
S4: In this state, all content of main memory is saved to non-volatile memory such as a hard drive, preserving the state of the operating system, all applications, open documents etc. That means that after coming back from S4, the user can resume work where it was left off in much the same way as with S3. The difference between S4 and S3, apart from the added time of moving the main memory content to disk and back, is that a power loss of a computer in S3 makes it lose all data in main memory.
S5: Soft Off-- Some components remain powered so the computer can "wake" from input from the keyboard, LAN, or USB device. S3 - SUSB# S4 - SUSC# S5 - S5#
I/O Controller Hub (ICH) is a family of Intelsouthbridge microchips used to manage data communications between a CPU and a motherboard, specifically Intel chipsets based on the Intel Hub Architecture. It is designed to be paired with a second support chip known as a northbridge. As with any other southbridge, the ICH is used to connect and control peripheral devices.
As CPU speeds increased data transmission between the CPU and support chipset, the support chipset eventually emerged as a bottleneck between the processor and the motherboard. Accordingly, starting with the Intel 5 Series, a new architecture was used that incorporated some functions of the traditional north and south bridge chips onto the CPU itself, with the remaining functions being consolidated into a single Platform Controller Hub (PCH). This replaces the traditional two chip setup.
(GMCH)
The northbridge typically handles communications among the CPU, in some cases RAM, and PCI Express (or AGP) video cards, and the southbridge. Some northbridges also contain integrated video controllers, also known as a Graphics and Memory Controller Hub (GMCH) in Intel systems. Because different processors and RAM require different signaling, a given northbridge will typically work with only one or two classes of CPUs and generally only one type of RAM.
There are a few chipsets that support two types of RAM (generally these are available when there is a shift to a new standard). For example, the northbridge from the NvidianForce2 chipset will only work with Socket A processors combined with DDR SDRAM; the Intel i875 chipset will only work with systems using Pentium 4 processors or Celeron processors that have a clock speed greater than 1.3 GHz and utilize DDR SDRAM, and the Intel i915g chipset only works with the Intel Pentium 4 and the Celeron, but it can use DDR or DDR2 memory.
Test
After start clock generator ic give supply,reset,clock signal voltage to ICH,PCH,CPU and graphics controller.
1. Clock Generator Crystal - 14.31818 MHZ ok Crystal is Working 2. Clock Generator Pin 5 - 14.31818 MhZ ok Clock Generator is Working. Signal Goes to ICH 3. MIni Wann Card - Pin 22 PLT Reset 3.3 volt ICH OK. If No Voltage shoult check ICH 4. CPU - Reset voltage in Cpu Socket PCH OK 5. CPU - Power Good voltage in CPU Socket CPU Power Good OK
