CUSTOMER STATES: "ONLY NEEDS BIOS UPDATE" |Should be an Easy fix right? Asrock B450 Gaming K4 Repair

hello and welcome to yet another video today we have a b450 gaming K4 from Azo a fatality one this is quite nice desk um desktop main board this is an am4 board this is ryzen let's get this unpacked and let's see what is wrong with it and here we have our beautiful Bard now this B as you can see b450 gaming K4 this is interesting form factor this is quite small in like the width but it is tall like large and this board came to me for a bios flash that wasn't successful so our bios chip is right there as you can see we have the header programming header right next to it and the first thing that I would want to see is if this board has any way to uh flush it offline like without the processor or anything for this you would look at the Io if there's a button anywhere there and if there's not one at the AO you would look at the bottom to see if there's like a q flash Plus or something like that a button for it but as far as I can see this board does not support any kind of flashing without the processor and without this thing booting up so that seems to not be an option for us this time which means we will need to try different processors in here and we will need to try if we can erase the BIOS or reset the bios with the battery but I think the person would have already tried this and if that all doesn't work we're going to program the SPI or the ROM chip by disordering it and plugging it into computer and putting new bios onto him but let's try now to plug a CPU in here going with our 2,200 G and I will be back as soon as everything is built up and now we are fully built up we have the 2,200 G here we have post cards card here and there and there's no post LEDs on this one sadly but I'm going to tell you what I will see on the post on those postcards and let's see for the power consumption I'm going to turn it on now we're going to connect the negative clamp and now the positive clamp let's adjust it a little bit and let's see and we have oh a little bit of rising for because of the allergies probably around 100 milliamps plus or minus going up and down let's see we now need a power button and our speaker and now with those attached let's try to turn it on and we get power consumption of 1.3 amps it is not static it is jumping a little bit on the the postcards I actually can't see any progress only on the pcie card I can see PCI reset being taken off and being applied over and over again so I think this is actually a bias problem so let's turn this off again it turns off let's see now we're going to okay it started by itself let's turn it on off by the power supply let's remove this bios battery now and now let's see is there any header that is called uh clear seamos or something yeah there is we're going to prop this header I'm going to I'm using tweezers just to hold it on to those two pins and we're going to wait a few seconds we're also going to push the power button a few times and what we're also going to do is going to short the contact of the battery just to be very sure and now this should be enough let's turn on our power supply again and now let's hit the power button and let's see still getting no post codes still getting about the same amperage so I don't think that anything will change unless we Flash the BIOS actually um I'm going to try different processes in here see if they actually start uh any any post codes if that doesn't help we're going to go over to flash the chip so we didn't have any change with the other processors so now we see our bios chip let's clean it a little bit so we know what kind of chip this is so this is an mx25 u128 73f let's punch that into Windows uh into Windows into Google and let's see if this is a 3.3 volt chip or if this is an 1.8 volt chip so I've just looked it up and this is a 1.8 volt chip meaning we need to use the adapter to flash this chip so I've now flashed our bios chip this took approximately like 15 or 20 minutes we now getting the BIOS chip off and putting it back onto its right uh rightful place so you now see me putting on the chip back again our freshly flashed bios and also cleaning it up as you can see some solder pads had to be cleaned up the little bit had a little bit too much slda I just went over it with the soldering iron once again and after that I tried to actually boot the board up because I I was very sure that the board was ready but it actually didn't boot it actually had the same behavior as before and then I went on my way to physically inspect the sport and would you believe it I was lied to you yet again this board probably did not have any bios issue this board was physically damaged can you see this resistor right here it is broken half of it is is missing as you can see from about there down to here it is cracked and it's missing the half who knows maybe someone did actually do a bios update and wanted to swap out the CPU in the same terms and then did the damage and thought this was a bias issue and not his damage but as we can see this resistor is now is dead so I will need to find a board view for this or a schematic so they can see what kind of resistor needs to be placed in there and now we are in our board view software and if we go up here we see the row of resistance that we had and it was the fourth one from the bottom which is this one which is a 10 Ohm resistor that we need that is directly connected to the CPU okay and the other side gets uh it goes to the SL so the vrm controller so we probably didn't have V cor that was probably missing then so let's replace that resistor with the 10 ohm one and let's see if this boort be behaves any differently after that and now we have our original bias installed again and we got the board built up a little bit and let's see if this now will post again and the current consumption looks very healthy looks good jumping up and down just as we want to see it and let's see if we actually get a picture out of this because of a different bius this probably has to to reset once or twice and as we can see we have a bios screen so the uh the original bios was not faulty the original bios was working so it wasn't a bias update that failed but it was the knocked off resistor that uh caused a problem and as you can see we are booting into Windows through our nvme SSD already so I think this BST is fixed I'm going to do the usual procedure that I have of testing the ethernet I can already see that it's working test doing some Lin pack passes doing some graphical te tests testing the first PCI slot and so on and so forth but I'm not going to bore you with this on this board if there's anything to be seen I will show it to you but I don't think there will be so thank you very much for watching I hope hope you learned something yet another customer who presumably knew the answer that this wasn't quick and easy fix but as you could see never trust a customer even though the customer is always right yeah so be cautious out there what you buy what you trust of the eBay listings and happy fixing thank you very much for watching and goodbye

Channel: Mainboard Medic

Views: 1,812

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Id: S96RLd6jvbU

Length: 9min 54sec (594 seconds)

Published: Sat Feb 10 2024