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Computer RepairComputer RepairM. Fahrur RoziM. Fahrur Rozi

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Messages / Warning Error POST (Power on Self Messages / Warning Error POST (Power on Self- -Test)Test)

w e must kno w the message / w arning error performanceresults of the POST form of a PC display, a visual on themonitor and the beeps from the speakers.results of further indicated by POST beep code (according tothe BIOS that is used) if found to the problem.In addition to beep usually in certain circumstances can beseen also a message / w arning errors in the form of text thatis displayed on the monitor screen.

Number Number SymptomsSymptoms Diagnostic Error Messages or Diagnostic Error Messages or WarningsWarnings

1 CPU and Monitordead, no beeps

1. Physical installation intoelectrical voltage AC 110/220V2. Po w er supply

2 CPU life, Monitor Off,No beep

1. Installing the data cable fromthe VGA card to Monitor2. Monitor

3 CPU life, Monitor Off,there is a beep

Adjusted for the number of beeps

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Computer Hard w are RepairComputer Hard w are Repair

Symptoms: When turned on, no display on the monitor, the indicator light (LED)Symptoms: When turned on, no display on the monitor, the indicator light (LED)on the front panel is lit, the indicator light (LED) flashing monitors, po w er supplyon the front panel is lit, the indicator light (LED) flashing monitors, po w er supplyfan and processor fan spin, no beep sound on the speakers.fan and processor fan spin, no beep sound on the speakers.Solution:Solution:

a.a. loose cables connected to the CPU, then cashing out all the scre w covers.loose cables connected to the CPU, then cashing out all the scre w covers.b.b. check your motherboard carefully, see Chip (IC), Elko, transistors and.check your motherboard carefully, see Chip (IC), Elko, transistors and.

Change reply components burn.Change reply components burn.

c.c. If there are no signs of burnt components likely motherboard is still good,If there are no signs of burnt components likely motherboard is still good,maybe krusakan located in the BIOS Programmaybe krusakan located in the BIOS Program

1.1. MotherboardMotherboard

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Computer Hard w are RepairComputer Hard w are Repair

a.a. Open the po w er supply box, checking physical electronic components,Open the po w er supply box, checking physical electronic components,perhaps there is a fire can be kno w n.perhaps there is a fire can be kno w n.

b.b. Open the po w er supply box, checking physical electronic components,Open the po w er supply box, checking physical electronic components,

perhaps there is a fire can be know

n.perhaps there is a fire can be know

n.c.c. Check the po w er s w itching transistor 2SC3039 (t w o pieces). When oneCheck the po w er s w itching transistor 2SC3039 (t w o pieces). When onetransistor is damaged, replace both, for secure and symmetricaltransistor is damaged, replace both, for secure and symmetricalcharacteristics.characteristics.

d.d. Remove the four diode brigde that direct AC po w er leveling on the insert,Remove the four diode brigde that direct AC po w er leveling on the insert,check the condition of this diode w ith a multimeter.check the condition of this diode w ith a multimeter.

e.e. Check the po w er on reset transistor, and resistor kapasisitor also found on theCheck the po w er on reset transistor, and resistor kapasisitor also found on the

transistor base circuit.transistor base circuit.f.f. Check all the solder result on the PCB Po w er SupplyCheck all the solder result on the PCB Po w er Supplyg.g. Check ICTL494. IC is only in the test by comparing both the po w er supply ICCheck ICTL494. IC is only in the test by comparing both the po w er supply IC

others & kind.others & kind. . .h.h. Check if the fan rotates, measuring voltage cableCheck if the fan rotates, measuring voltage cablei.i. Replace the load w ith the motherboard or a full load as before, try again.Replace the load w ith the motherboard or a full load as before, try again.

2 .2 . Power SupplyPower Supply

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Computer Hard w are RepairComputer Hard w are Repair

D amage On C DR OM / R W, DVDR OM / R W: Not detectedD amage On C DR OM / R W, DVDR OM / R W: Not detecteda.a. Check the po w er cable (if loose tighten it)Check the po w er cable (if loose tighten it)b.b. Check the data cableCheck the data cable

c.c. Check JumperCheck Jumperd.d. Check the BIOS settingsCheck the BIOS settingse.e. Check the LED lights and button eject, if not function means the damage is onCheck the LED lights and button eject, if not function means the damage is on

the controller board CD / DVDthe controller board CD / DVDf.f. unloading and try to check if no solder results are loose or cracked solder, tryunloading and try to check if no solder results are loose or cracked solder, try

to solder again.to solder again.D amage On C DR OM / R W, DVDR OM / R W: Can not R ead C D , Can R ead But SelectD amage On C DR OM / R W, DVDR OM / R W: Can not R ead C D , Can R ead But Select- -

Select a CD

(Only the Original CD

/ Still Can Be GoodR

eads)Select a CD

(Only the Original CD

/ Still Can Be GoodR

eads)a.a. Damage to the optic: dirty or has been w eak. The fix: loading CD / DVDROM.Damage to the optic: dirty or has been w eak. The fix: loading CD / DVDROM.b.b. note the set of optical images, w here there are no settings trimpot middlenote the set of optical images, w here there are no settings trimpot middle

section / trim for head scre w driver.section / trim for head scre w driver.c.c. clean the optical head w ith cotton bud. connecting po w er cable and See.clean the optical head w ith cotton bud. connecting po w er cable and See.

Watch from a distance (because it contains radiation), w hether the opticalWatch from a distance (because it contains radiation), w hether the opticallight out or not?light out or not?

d.d. If the issue despite the dim light /w

eak, trim / setting by turning the trimpotIf the issue despite the dim light /w

eak, trim / setting by turning the trimpotlittle and carefully clock w ise.little and carefully clock w ise.

3.3. CD ROM, DVD ROM, AND FDDCD ROM, DVD ROM, AND FDD

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Computer Hard w are Repair

Damage In the Floppy Disk: Not Detected / Led Lights Flame Continues /Damage In the Floppy Disk: Not Detected / Led Lights Flame Continues /Flopyy Disk Error.Flopyy Disk Error.

a.a. Check the data cable, there is the possibility of inverted install a dataCheck the data cable, there is the possibility of inverted install a datacable,cable,

b.b. restart again, usually w hen it's detected, the error message "floppy diskrestart again, usually w hen it's detected, the error message "floppy diskerror" w ill not appear and the light w ill light up shortly follo w ed byerror" w ill not appear and the light w ill light up shortly follo w ed bymovement and sound of the floppy diskmovement and sound of the floppy disk

Damage In the Floppy Disk: Can not Read / Write on DisketteDamage In the Floppy Disk: Can not Read / Write on Diskettea.a. first check w hether the floppy is good?first check w hether the floppy is good?b.b. Remove the lid / cover floppyRemove the lid / cover floppyc.c. Clean w ith very carefully using a brushClean w ith very carefully using a brushd.d. See head up and do w n, clean up using cotton bud w hich has beenSee head up and do w n, clean up using cotton bud w hich has been

dampened by alcohol, then you try to clean up the dirt on the head updampened by alcohol, then you try to clean up the dirt on the head up

and dow

n.and dow

n.

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Computer Hard w are Repair

How to deal Harddisc Failure?How to deal Harddisc Failure?DamageDamage : : After the Po w er On Self Test, BIOS to report that there is aAfter the Po w er On Self Test, BIOS to report that there is a

hardw

are error, report error Harddisc Failure". The computerw

ill stop and nothardw

are error, report error Harddisc Failure". The computerw

ill stop and notmake the system boot process.make the system boot process.The solutionThe solution : :

a.a. check the data cable and po w er cable hard drive, check your harddisccheck the data cable and po w er cable hard drive, check your harddiscJumper.Jumper.

b.b. Check the BIOS Setup, (Standard Setup)Check the BIOS Setup, (Standard Setup)

c.c. If the hard drive is not detected, then the physical disk is damaged. ThereIf the hard drive is not detected, then the physical disk is damaged. Thereare some symptoms of damage w hen hard disk is not detected at selali:are some symptoms of damage w hen hard disk is not detected at selali:

a.a. In a flame situation you observe and listen on my hard drive,In a flame situation you observe and listen on my hard drive,usually w ill sound velocity of the disk / platter. If there w asusually w ill sound velocity of the disk / platter. If there w assignificant damage to artifacts in the controller.significant damage to artifacts in the controller.

b.b. If the sound clash of metal inside the hard drive means there isIf the sound clash of metal inside the hard drive means there isdamage to the controller.damage to the controller.

4 . Harddisk

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Computer Hard w are Repair

c. If it does not sound at all damages is still the same contained inthe controller (For damage above you can replace its Controller.Controller must be exactly the same as the type / kind to yourhard disk).

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Thank You For Your AttentionThank You For Your Attention