Motherboard Repair Powers On but No Beeps No Boot - LER #089

Apologies for low audio level on the first part of this video!

Learn Electronics Repair #089
ASUS H61M-G Motherboard.

This motherboard powers on but it does not beep, even with no RAM, and it does not boot. Can we fix it? Watch to find out...

I work in collaboration with:
The Electronics Channel (live streams with Carlos and Detlef)

Gran Canaria Uncovered

For All Your PCB needs: free $5 discount coupon

Equipment used in my videos. These are affiliate links, you pay the normal price and I make a small commission.

TEST METERS
ANENG AN8009 MULITIMETER
KAIWEETS HT118E MULTIMETER
VC480C+ MILLIOHM METER
MESR-100 ESR METER
XC6013L CAPACITOR METER

TM-902C TEMPERATURE METER
LCR-T4 COMPONENT ANALYZER
FNB58 USB ANALYZER
PCI POST ANALYZER
TL460S PLUS PCI_E ANALYZER
TOOLTOP ET120MC2 SCOPE
FNIRSI 1014D SCOPE
NPS3010W 30V 10A PSU
T12 STATION WITH M8 9501 HANDLE
M8 9501 HANDLE
YIHUA 982 Soldering Station C210/C245
FNIRSI HS-02 PORTABLE SOLDERING C210/C245
QUICK 861DW
PROS'KIT SS-331H

INFIRAY P2 PRO IR CAMERA + MACRO LENS
TOOLTOP ET13S THERMAL CAMERA METER
ET13S MACRO LENS
OPTICAL MICROSCOPE
TOMLOV TM4K AF FLEX
TL866 II+ PROGRAMMER
CH341 PROGRAMMER
NC-559-ASM FLUX

DESOLDER BRAID (I use size 8045)
HX-T100 SOLDER (0.6MM)
ESD-11 TWEEZERS

Learn Electronics Repair is now on Discord! Come and join the fun, it's free.

If you would like to support this channel
You can send donations
You can subscribe to Patreon
You can click Join to become a channel member

Thank you
Richard

[Xorat]

Richard and his magic hands, which gets stuff just to work, absolut fantastic! haha

[SeanBlodgett]

To anybody else watching this video, this is an absolutely horrendous way to clean any type of PCB. Tap water contains so many minerals and impurities that while it may look like your system is functioning for a while, oxidation and corrosion is building up that can cause a short circuit that can not only destroy the motherboard, but many things attached to it; memory, video card, power supply, and SSD/HDD.

If you have to clean a board, use the purest alcohol solution you can find, and in the smallest amount and region possible. Also make sure to dry clean the area first to remove as much of the contaminate as possible before using the alcohol. If there is contamination under a large chip, you're going to have to clean by soaking the chip in alcohol, letting it sit for a bit, then using air to blow the alcohol out from under the chip. Just letting it dry will leave the junk underneath. Do this multiple times until the alcohol coming out is clean of contaminants.

If you HAVE to soak the whole board, follow the same dry clean first, then alcohol directions, but when it is submerged, you want to start giving the whole board some side to side and rocking motion to knock that stuff loose and off. Depending on location, you can also use a very soft toothbrush to help in this. DO NOT SCRUB. Just pretend you're a paleontologist uncovering some velociraptor bones, gentle strokes. You're removing soup/soda/bong water not trying to scrape off the solder mask (conformal coating on some boards). Take the board out and blow out from under the large chips, the CPU/MEM socket, and the IO ports. Let this dry on its side for about thirty minutes. Now the next step is something I have done, but it can be dangerous if done incorrectly, I would take a reflow gun and set it to the lowest temp (100°C) and from a distance of several inches and at varying air speeds, go over the entire board, front and back, until the entire board was heated up to a "warm" temperature. Not blistering hot and not cool. This helps with making sure there is no stubborn 1% or 9% of water (Depending on which isopropyl alcohol you use) stuck in some of the VIAs (vertical interconnect access) holes or between two solder balls or in a little nook or cranny of a slot/socket. After all that, let it cool down to room temperature and try to fire it up again.

If you still have no joy after all that, assuming you didn't test the memory/CPU/PSU/CMOS battery/monitor/video cable first, it's probably time for a new motherboard.

[newvaper]

i tried washing my motherboard before but i did not use tap water. i bought a gallon of distilled water. washed the board with dishwashing liquid and dried the board up with a heat gun. the board is still working until now. thanks for this video.

[R.AudioElectronics]

Maybe it’s me here in San Diego, CA but the audio level has been low on 2 of the videos

[PiotrK]

Fucking genius... He spent 17 mins to figure out that mobo needs RAM to booy. LMAO

[Dutch_off_grid_homesteading]

Heya, sorry but I'm gone say this, richard get your self a small vacuumcleaner maybe even at the car boot, maybe even as a repair, yes I know they problebly will be durty so you have to clean it sorry. lol

[antonioveloy]

It didn't bleep because you have a debug card connected. In that case the bleeper should be connected to that card, not to the pc.

[farben_]

I've always thought washing the boards to fix them was a myth but I guess it can work when the board is in a bad state with all that rust.