Re: Toshiba C875 runs on battery but not adapter
It didn't seem to suffer further damage, thankfully. But I decided to part the machine out. This problem is beyond my abilities. Thanks.
paul1149
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Last Activity: 02-24-2015, 08:18 AM
Joined: 10-20-2011
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Re: Toshiba C875 runs on battery but not adapter
Thanks, I don't see anything visually wrong with that element, and don't know what further to do about it.
I did probe around. In the attached photo, the element circled in red attracted my attention. Is it a fuse? Because my theory is that a power surge burned out the adapter input circuit.
All the elements circled in blue had +19 volts at both ends. The element in red had 19v at its end near the power block, and 0v at its other end. The element circled in black registered 0v.
I shorted...Leave a comment:
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Re: Toshiba C875 runs on battery but not adapter
One more clue. When booted into Win8, with the adapter connected the battery shows it's charging, but it isn't. I updated the BIOS and reloaded the Windows battery driver, but the battery is still losing steam. Evidently the MB sees the adapter, and thinks it's charging the battery, but it's not happening.Leave a comment:
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Toshiba C875 runs on battery but not adapter
Hi folks,
I've got a 17" Toshiba C875-S7304 laptop. It's motherboard is a:
Hannstar J MV-4 94V-0 :239
E89382
PLF/CSF/CSR UMA MB
It's close to the board in this thread: [url]https://www.badcaps.net/forum/showthread.php?t=28897[/url], which is a PLF/CSF/CSR DSC MB but in places it almost seems to be a mirror image of the pics there.
I'm not good at this stuff, so probably I'm looking for general guidance and a idea of how hard it would be to fix this.
If I place a good battery into the unit, it will run... -
Re: Dead Dell 1905FP LCD monitor
Gentlemen,
Observe your handiwork. I got the three caps today, and put them in this evening. The hardest thing by far was remembering how this thing went together. Next time I think I will need to put the machine together as I await the parts.
But aside from that the job went very easily. Amazingly so, actually. Many thanks for your insightful guidance. We now have another monitor at our disposal.
THANK YOU,
p....Leave a comment:
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Re: Dead Dell 1905FP LCD monitor
Thanks, but I don't see a C112. On the back I see the solder points for C110 and C111, but they are under the big cap, and I don't see anything corresponding to them on the face of the board.Leave a comment:
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Re: Dead Dell 1905FP LCD monitor
Thanks, that was helpful. I decided to stay in-house here, to order Rubycons, and to try the incremental approach.
I just checked those output voltages, and all the Ground, 12V and 5V terminals are registering fine. I'm getting nothing from the On/Off, Ready, and DIM terminals, but I'm not sure I should. I have the power board detached from everything else but the line voltage.
Lacking any contradictory indications here, I'm going to order the three bulging caps tomorrow.
I did try to take pics without...Leave a comment:
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Re: Dead Dell 1905FP LCD monitor
I'm not questioning your analysis, I'm trying to figure out the probability of success while feeling my way through something I've never done before. I followed PlainBill's sig links, and ended up at Mouser's. They seem to have a great selection, but what do I choose for the tolerance range? The existing caps are Samxon, 105deg C8.
Thanks,
p.Leave a comment:
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Re: Dead Dell 1905FP LCD monitor
Awesome. Thanks very much to all for the input. Let's see if I can get this right.
First, I checked across the big cap and it indeed looks like about 160V DC.
Second, the new pics should be attached.
Third, I don't know what a PFC is. I don't mind replacing all the caps, but is there some way to ascertain whether the caps are the problem here?
Appreciate your time. I'll try to remove the previous thumbs.
p....Leave a comment:
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Dead Dell 1905FP LCD monitor
Hi,
I have a really nice monitor that I'd like to get working. The Dell takes in line voltage (120V AC). But nothing lights up at all, not even neon lights.
I took it apart and found three bulging capacitors. The main fuse seems to be ok. I found about 400V across the big capacitor, using an AC multimeter scale.
Other than that I don't know how to proceed. I don't have an extra CCFL on hand.
In the first picture below, the three caps are the ones in the foreground, left. They are 1- 820uF, 25V GF(M) (the tall one) and 2- 1000uF, 10V,...
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