Is there a sure way to tell when a chipset or any other BGA chip is fried or it just needs a BGA reflow/rework. I have resurrected a few desktop by reflowing the southbridge and northbridge but reflowing won't work most of the time in my case. Laptop motherboards are a different story, I have resurrected many HP DV series laptops by reflowing (I'd say about 90% success rate). Is there a way to tell when a motherboard has a fried BGA chip?
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Guns don't solve problems. I'll take 12
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Re: Sure way to tell when chipset (or any other BGA chip for that matter) is burnt on
If it looks discolored then that is a good sign it could be fried and not just need reflowing/reballing. Other than that the only sure way is to test each pin. -
Re: Sure way to tell when chipset (or any other BGA chip for that matter) is burnt on
How does one go about testing each pin?Guns don't solve problems. I'll take 12Comment
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Re: Sure way to tell when chipset (or any other BGA chip for that matter) is burnt on
Get the spec sheet for the BGA you are testing and start checking each pin for the proper signal.Comment
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Re: Sure way to tell when chipset (or any other BGA chip for that matter) is burnt on
Scope... some boards have pads near the chip. See if voltage is going into it.Comment
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Re: Sure way to tell when chipset (or any other BGA chip for that matter) is burnt on
There is a true and tried way to tell, but only a few people really know. Hers the trick...look really close (might have to get a magnifying glass) and if it says 'nvidia' on it and its not on a video card, that means its not worth the botherCap Datasheet Depot: http://www.paullinebarger.net/DS/
^If you have datasheets not listed PM meComment
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Re: Sure way to tell when chipset (or any other BGA chip for that matter) is burnt on
surely you can get new nvidia chipsets on ebay, why you'd want to, I don't know, but I guess it would be possible to replace it if you had the tools."Tantalum for the brave, Solid Aluminium for the wise, Wet Electrolytic for the adventurous"
-David VanHornComment
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Re: Sure way to tell when chipset (or any other BGA chip for that matter) is burnt on
nah I wouldn't buy new chips and replace them, I just want to be able to tell if the chipset is bad so I don't spend time messing with the boardGuns don't solve problems. I'll take 12Comment
their GPU's aren't strangers to sudden death too.
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Hi guys
This Zotac GTX 260 had a high side MOFET on one Vcore VRM phase short circuit Drain to Gate (Not short Drain to Source)
This has burnt out the drive IC L3E (ADP3110A) and also an SOT-23 device very close to the driver IC. According to the PCB markings 'Dxxx' this is likely to be a diode.
Basically the VRM has 4 phases, two powered from one 6 way connector and two powered from the other 6 way
I would assume each pair of phases are basically identical, the burnt out phase has SOT-23 devices WW1 plus the burnt one.
The good phase... -
Hi Dear Friend., I am working on a Apple MacBook Pro A2338 820-02773-A. The history was that the AON Rail on the Trackpad connector JT400 was burnt. After I removed the burnt connector, I tested with the meter & no shorts. Connected the USB C power & all booted fine, no problems at all. I soldered a New TP connector put in the old trackpad with a brand new Flex cable. The laptop beeped in the start but no display. I removed the connector & the display was fine again. USED a known good Trackpad & a Flex cable, even with this still the same problem. I checked the connector whether... -
I picked up this used Bose Acoustimass 10 IV speaker system. Speakers seem to work fine, but the subwoofer does not make any noise. So I took apart the unit and found some obviously failed (burnt) components:
- 1x 3.14 A @ 250V main circuit fuse
- 1x bridge rectifier GBU601. there's actually two of these on the board, one is obviously burnt and the other does not seem to have any anomalies like shorts. However I figure may as well replace both.
- 2x diode. This is tricky because the only markings I see on it are: "617 402". No current rating or anything else.... -
Hi,
solder joints on heat sinks - how much do they matter? Could poor joints on heat sink cause issues if they are not properly joining to hot ground?
I'm looking at power source module of Panasonic plasma TV and I see many of these having visually poor quality, but could they matter? In general I would guess no, but I saw a video where someone was stressing out the importance of tightening the screws when fastening the power source board specifically for the ground to be connected properly.
Thanks -
I've got a 240v LED uplighter which isn't working. Pulling it apart shows a clearly burnt resistor on the circuit board, and I'm hoping some of you will have suggestions on what to replace it with. First, here are some photos. Power comes in, through the fuse and choke, then through the big blue variable resistor labelled B500K (ignore the similar blue component at the bottom - it's a simple switch for an attached reading lamp). It then passes through the burnt resistor (or at least did once), through diac DB1 and the unburned 30 ohm resistor to the gate of the triac.Now I assume there's a simple...
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