No Display in ASUS PC Solved
A PC was brought in by a fellow-worker to my workshop because it was having a strange behavior (it was very slow and hanging from time to time) and the owner told me I had to reinstall the Operating System.
When I switched-ON the PC, it had no Display, so the job was not only Operating System re-installation.
First of all the PC was disassembled and the voltages from SMPS were checked.
As we can see from the photos above the outputs from SMPS were ok, so some other circuitry had to be checked, beginning with the following steps:
1. RAM memory: it was taken out and cleaned, but trouble continued.
2. 8Mb BIOS: it was pushed downwards, to avoid any false contact, but trouble continued.
3. Microprocessor: it was taken out and its contacts were cleaned but the trouble continued.
4. SMPS: it was taken out from chassis, but before disassemble it I had the idea of seeing the voltage selector at the rear cover of the SMPS, and let’s see what I saw:
The SMPS was selected for working with 230 volts (AC), and in my workshop I use only 110 volts (AC) so when I fixed this situation and switched-ON the PC the Motherboard (ASUS P5KPL-CM in this case) showed Display. But another curious item to take into account: as some circuitry had been cleaned previously, it was not necessary to re-install the Operating System, in other words, there was dust around the circuits which was causing the very slow behavior and the hangings too.
This article was prepared for you by Humberto Rodriguez, one of our ‘Master Authors’ from Cuba.
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