I'm working on--really just learning how to repair--an Acer Chromebook that no longer works. As far as what is wrong with it, when you plug in the charger, the light on said charger goes out. The first thing I did, then, was check the power rails for a short, which seems to be the main culprit in many instances, but not in this one. No shorts, but I did find something that confuses me. From the attachment, you can see that I circled a capacitor. The reason I circled it was that it reads "OL" (In resistance mode). I changed it, but the issue persists. This is the opposite of a short, right? Just trying to wrap my head around it, which is painful, by the way. Lol. Any explanation why this might be the case? Thanks in advance!
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If the adapter light goes off,definitely you have short on 19V rail. Check resistance to GND on the dc jack itself. Sometimes the protection diode just after the dc jack gets shorted and under such case,all caps connected to 19V will show OL. -
Double checked the dc jack and it's good. This is a weird case. The capacitor in question is the only one reading OL. The one other thing of interest is I'm getting 19 ohms reading on several points on the 19v rail, but nothing any lower than that. This really has me puzzled.Comment
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There is nothing weird and nothing to puzzle about. A ceramic capacitor will always read "O.L." out of circuit, and this bootstrapping circuit is simply designed like that. Usually there is way more to consider and most of the time It does not work like that with this two-dimensional "solution".
19 Ohms at the Main Power Rail is a partial short, usually caused by a shorted high-side mosfet and likely means bad news for you.Comment
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Hello.
I have this HP Omen 17-an108nc that show 3long and 2 short/memory error/ led blinks on Caps-lock after capacitor short on 5V line.
Come with one shorted capacitor on 5V line. After replce it just blinks memory error. i flash main and EC bios but still the same. I have all voltages on start, cpu fan spining, but onli capslock blinks and no picture
any hint? -
Hi people, I hope this is the correct spot to post this, I'm new to the forum.
I have an RTX 3080 Founders Edition which has a burnt up capacitor (it was in parallel with another capacitor which appears damaged too), so I am hoping to be able to identify the capacitor values and order replacements.
I hope these photos make it clear which component I am referring to:
(yes, the soldering is a bit botched from removing the blown one, I know)
I have found the board schematic (attached), but there does not seem to be a boardview available. I have never... -
I check PPBUS_AON and there is a short present on the line, the computer shows a short when testing for short to ground, so when I inject voltage into the line, I get 0AMPS so no short is showing up. I have replaced a blown cap on this board that exploded and tested for the short and it is now removed. Any suggestions? I tested voltage at the line when the fuses are connected and I am getting 1.2 Volts at the line.
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I replaced some capacitor which is located on optical pickup pcb which is shown in the table below(PCB #2).Because it have been out of order.
Now,It works very well,But I just have found that all caps (6svpc100my and other part number as well) ,which is shown in the table below, has ultra-high ripple current spec.
It is not able to obtain any capacitor which can be a substitute for this ultra-high ripple current nichicon capacitor.
So I replaced it with samxon and rubycon's general capacitor(GP,YXA series).
I know that these capacitor will not last as long as nichicon capacitor... -
Hello everyone,
I'm trying to repair my old Acer Nitro 5 (AN517-54-55T5). I've already bought a new laptop, so this is more of a learning project. For the experience, with no high expectations of success.
Well, my decice specs are the following:
Model: Acer Nitro 5 AN517-54-55T5
CPU: Intel Core i5-11400H
GPU: NVIDIA GeForce GTX 1650
Motherboard: GH51G LA-L181P Rev:1c
The symptom:
When pressing the power button, the power LED lights up for about 5 seconds and then turns off. Initially, the issue was intermittent: sometimes...05-26-2025, 10:49 AM
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