Address: Dumaguete City
Motherboard : ASUS P4PG - MX
Processor : Intel P4
Memory : 512 Mb
Operating System : Win XP Sp2
Technician: Rogin Diez
OBSERVATIONS
- A beep on boot-up
- No Display
- Display Monitor pilot lamp is at steady green.
SUSPECTED TROUBLE
- Peripheral connection / failure
- Video Card
TROUBLESHOOTING PROCEDURE
- Unplug the system unit from the AVR
- Video Card
TROUBLESHOOTING PROCEDURE
- Unplug the system unit from the AVR
- Drain off any ESD (Electro-static discharge) by holding the system chassis for a minute
- We unscrewed and remove the left side cover of the system unit. Turn the side down with the open side facing up.
- Removed the peripherals ( HDD, CD - ROM, Sound Card, and the WLAN Card) Thus leaving just the ram and video card intact.
- Turned on the system unit, we then observed the system now beeped once indicating that the system is ok. CRT Pilot lamp flashes a steady green light and having no display.
- We turned off the system then unplugged, we removed the video card and depended on the VGA port instead. And upon turning it on, still 1 beep, a steady green light on the CRT, and NO VIDEO DISPLAY.
- We checkedif the RAM is defective, cleaned its connector edges and transferred it to another slot. And then again, 1 beep, steady green light, and no display. RAM and the slots should be ok.
- The CPU was then reseated and applied with a thermal paste on its heatsink contact surface. The heatsink will increase or fill the micron gaps between the cpu and the heatsink.
- But when the system was turned on again, the result were stiull the same. A beep on boot up, green steady light on the CRT, and NO DISPLAY. The CRT must be defective.
- We borrowed another CRT and connected it to the system unit we were fixing and as it was turned on, there was a display. The CRT is found to be defective.
- The removed peripherals were then installed back and upon turning on the system using the good CRT. Everything is just OK.
DEFECTIVE PERIPHERAL
- Cathode Ray Tube (CRT)
In checking display problems, stick to checking the display peripherals rather than jumping from one that is non-relative to the probable cause of the display problem.
