Fixing the desktop caused a critical problem after reassembly of my computer.
Fixing the desktop caused a critical problem after reassembly of my computer.
Hello everyone, I own an Asus Desktop G11CD-K (K stands for Kabylake version). I disassembled it thoroughly to inspect every component—including the graphics card fan, processor and CPU fan, replacing thermal paste, and handling front parts. After cleaning, I reassembled it correctly, but I wasn’t sure I used all the correct fasteners, relying mostly on placeholder markings. Once I powered it on, most components functioned properly: CPU fan, graphics fan, power supply, and HDD worked fine. However, other elements failed—back fan didn’t spin, USB devices didn’t connect, monitor signals were absent, and even after removing everything piece by piece, nothing changed. I tried reassembling multiple times, swapped RAM slots one by one, and tested basic parts. I connected the motherboard to the case and observed no changes. Occasionally, with a PCI GPU or iGPU, the signal would appear, but not consistently. I removed the back fan from the board and tested it with a 9V battery—it worked perfectly. I verified PSU voltages using a multimeter and a tester, everything matched expectations. I reset the CMOS by removing its battery for about 20 minutes, but the problem persisted. When plugging in a USB mouse or keyboard, it would light briefly then shut off. Extra notes: when turning on, CPU fan, PCI GPU fan, and HDD operated normally, but all other peripherals didn’t. I used an HDD station to confirm the drive was alive—successfully recovered data. During cleaning, I applied an electronic cleaner, though I’m unsure if it helped since the manual labeled it safe for electronics. After following all previous steps, I tried another cleaner video hoping it would resolve the issue, but it didn’t. Before cleaning, I double-checked that no components were connected to the PSU and reset capacitors by holding the power button for 30 seconds. I forgot to remove the CMOS battery from the board. My concern is whether this could have caused a short or damaged the motherboard, affecting other parts like the CPU. Could it be safe to use another motherboard? Should I repair it or replace the damaged parts? Can I test the motherboard and CPU with a multimeter? Any additional tips would be greatly appreciated. My main aim here is learning, not just fixing—so I’m open to your advice. Thank you!
I wouldn't have ever touched electronics cleaner on a computer. It seems risky at best. Just using compressed air is fine. But that's just temporary fixes. If the case fans won't start, then the power connectors on the motherboard are likely damaged—fixing it would require advanced skills and parts.
It seems like you're asking if the missing component might be affecting others. Without a functioning motherboard, it's hard to confirm the issue. Do you have an alternative system ready for testing the parts?
Be honest, I don’t have everything. But I do have testing tools like a multimeter, PSU tester, and an HDD station dock. The working parts are: PSU, HDD (data recovered to external dd), case back fan (tested with 9V battery and multimeter), and the graphics card (fan is visible but signal to monitor is missing). I’m still unsure about the RAM and CPU.
It seems your motherboard might be at risk. It’s unlikely it damaged other components, but you’re probably better off reaching out to ASUS for a replacement. You may need to cover costs if they can help. This is definitely a tough situation since it’s a prebuilt system. Cleaning the whole setup with their recommended cleaner could have caused more harm than good. It looks like the screws might be misplaced or there could be loose wires.
Hello, regarding the screws, I believe it's not the main issue. I checked my motherboard from the box and everything looks good; the wires are also fine. My plan seems to be swapping in a compatible motherboard that matches my components. I started one already but haven't purchased it yet. I'll share my thoughts once I complete this task. Thank you very much, no worries at all.