Re: Replaced NEC/Tokin capacitors now screen blank help please
FIXED - I just want to say a big Thank you for all the assistance - I also contacted the person wrote original YouTube video and he suggested maybe a tiny bit of solder was touching a close by component - I gently scraped with small flat screwdriver the solder back and worked straight away .
Smali - also suggested clean area around which I did so thanks for that also .
But thanks for all for suggestions hopefully this thread will also help someone else if run into same problem .
Thanks all owe you...
globalmark
Member
Last Activity: 01-22-2017, 10:49 PM
Joined: 01-20-2017
Location: Queensland
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Re: Replaced NEC/Tokin capacitors now screen blank help please
Hi Jiroy
Don't have external monitor - have LCD TVs , so tried s-video out of laptop (but think need do some settings in system to make work don't I ?) also tried the HDMI out to TV but nothing there ,
TV does have a PC in VGA socket but I don't have a cable - is it worth buying a cheap cable to try it ? VGA to VGA laptop to TV would this show as external monitor ? .?
Do I not have to change settings in operating system to make external display work ? Which cannot do when cannot see...Last edited by globalmark; 01-21-2017, 09:23 PM.Leave a comment:
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Re: Replaced NEC/Tokin capacitors now screen blank help please
Ok tried to restart without battery
Also resolder back in after couple mins and no change .
Thanks for suggestions ?
Can the replacement capacitors cause this ?
Am I lightly to have left something disconnected ?
Looks like nothing happening with monitor at all ?Leave a comment:
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Re: Replaced NEC/Tokin capacitors now screen blank help please
Hi all
Ok just taken apart again - reseated everything making sure clean removed and replaced CPU no pins bent .. No change
Lefos - battery removed is 3.19v out of computer -
Do you mean try to start laptop without RTC battery or just leave out one minute , solder back the battery and retry ?
Thanks MarkLeave a comment:
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Re: Replaced NEC/Tokin capacitors now screen blank help please
Hi guys
Capacitors are brand new came in sealed plastic - from eBay from Portugal reputable seller . For that correct purpose so as far as I know correct size.
I have remover CPU (if that's square thing many pins on it) twice now but will try again , has no bent pins but very loose fit , when took out was very easy and to replace basically dropped in then twisted plastic screw half turn to lock in.
just cleaned area - where is PCB line to check ? - I removed old capacitor...Leave a comment:
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Re: Replaced NEC/Tokin capacitors now screen blank help please
Hi guys
Thanks for help so far - how and where exactly do I check other voltage on PL coils (what is PL coil and where is it and how to check ) and ram (have removed and replaced several times in different slot) but only have one ram chip ..
What and how to check RTC battery ?
How to flash bios when cannot see screen - no external monitor (only computer in house)
Laptop was working before changed capacitors just restarting itself if plugged into mains power on battery...Last edited by globalmark; 01-21-2017, 01:48 AM.Leave a comment:
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Re: Replaced NEC/Tokin capacitors now screen blank help please
I used this video to remove and replace
[url]https://m.youtube.com/watch?v=4W2AljjOUYQ[/url]
And removed all chips/ things he suggested on video to stop damage to them the replaced - think main processor and graphics chip etc (not 100%) sure what they were but removed and replaced ok .
I also replaced with all new heat sink compound - removed old with alcohol cleaned and dried then some new if that makes a difference .
Could I have damaged graphics card (I was really gentle and...Leave a comment:
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Re: Replaced NEC/Tokin capacitors now screen blank help please
Hi
Just check across the terminals on capacitors and get .999v and .998-.999 on each side so basically 1 volt (checking on + and - strips under two of the capacitors and same other two .Leave a comment:
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Re: Replaced NEC/Tokin capacitors now screen blank help please
Hi
Thanks for reply
Photo taken of new capacitors . Have attached image .hopefully shows up .
How would I test that voltage , I have a basic multimeter but where and how should I test ?
As mentioned Laptop seems to power on ok just blank screen ? Would that be the capacitors or something else ?
Thanks Mark...Leave a comment:
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Replaced NEC/Tokin capacitors now screen blank help please
Hi
I have just replaced the NEC/Tokin capacitor in a Toshiba A300 as per instructions on this site and Internet and YouTube etc with the 4 replacement 330's (or whichever was correct)
I am a beginner when comes to laptop repair done light stuff before and I am ok at soldering .
All seems to have gone well no problems removed easily and soldered replacements on fine .no problems that I can think of .
I just put the laptop back together and turned it on. The fan spins and sounds like turned on lights all on etc however now the screen is completely black (blank)... -
Re: New Members - please post your introductions here
Hi guys
Thanks for advice been reading info for a while just attempted a new NEC/Tokin capacitor all went well but now new problems so will post .
Thanks in advance and great forum
Cheers MarkLeave a comment:
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