Member Avatar for jttslg

hi
i hope someone will be readin this and resolve my problem.
i own a toshiba satellite c650 laptop.
its front cover and hinges were broken so i plucked up some courage to repair it myself.
i got the required parts and watched some youtube video tutorial to disassemblt the machine.
The laptop was otherwise working fine.
However after reassembling i connected the video connecting wire on to the motherboard.
when i switched on the power it would not turn on. the fan would not spin. etc.
so i took the wire off and retried powering it on. it would not turn on,
after a few trials it suddenly switched on . i could not recall what i had done for that to happen.
Anyways, again i tried to reassemble the parts and connected the lcd video cable into the motherboard to test whether that was causing the problem.
Again the same thing happened, it would not turn on.
After repeated trials the machine still would not relent.
i am at a complete loss on what to do. Please someone help me to resolve the problem.
I am not having the finance to get it repaired elsewhere.

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  • Latest Post Latest Post by rproffitt

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A focused, low-cost diagnostic checklist to follow next (builds on ’s symptom report and ’s earlier suggestion). The failure started when the LCD/video cable was re‑connected and the machine now either won’t start at all (no fan) or works intermittently. That pattern most often points to a problem with the display cable/connector or a short created during reassembly (missing insulating tape, a stray screw, wrong-length screw, or a pin bent on the board).

Quick visual + mechanical checks (do these first)

  • With AC unplugged and any battery removed, open the area around the hinge and the motherboard connector. Look for torn ribbon insulation, bent pins on the connector, adhesive/tape that was not replaced, or any loose metal (screws, washers). Extra or mis‑placed standoffs/screws can short a board — a common failure mode. See the C650 display/connector checks in the official maintenance manual. (Toshiba Satellite C650 maintenance manual).

Electrical and isolation tests

  • Confirm the AC adapter actually outputs its rated voltage with a multimeter (if uncertain, borrow a known-good adapter). If the adapter and DC jack are OK, try powering the board with the internal display cable disconnected and an external monitor attached — the service manual lists this as the first display check. If the laptop boots only with the internal cable removed, the cable/panel or the connector area is almost certainly the problem. For general “no power” and adapter testing methods, iFixit’s troubleshooting guide is a useful reference. (Laptop won’t turn on — iFixit troubleshooting).

If those tests don’t help

  • Try a minimal-configuration boot (motherboard + CPU + one RAM stick, no HDD, display disconnected) on a non-conductive surface. If that works, add components back one at a time to find the failing FRU. If the problem only appears when the LVDS cable is back, replace the cable or LCD — LVDS cables for C650 are inexpensive and commonly available. Take ESD precautions and avoid powering the machine while cables are loose. For the screw/standoff risk and correct reassembly discipline, see general standoff/screw guidance. (Common build mistakes / standoffs — How-To Geek).

If these steps are too technical or still fail, a shop can do a cheap diagnostic (and pull data from the HDD if needed).

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Member Avatar for rproffitt

While I sympathize over the loss, there's not much magic here. Laptops are notoriously fickle when they get old. Watch a few more youtube disassemble videos and carefully go over your work.

But there's a generice reset I try on dead PCs that is worth a shot. Power off, remove charger and battery, press and hold the power button for 60 seconds. Release, slip in battery, apply power and test.

Member Avatar for jttslg

Battery does not work anymore . i tried doing it but didnt power on.

Member Avatar for rproffitt

. So that battery. I worry now that a dead battery was left in the laptop possibly causing strain to the main board and more. I see that a lot. A lot of folk don't understand that a bad battery is a bad thing.

Member Avatar for jttslg

i actually don't fit the battery. the problem started when i plugged the video cable into the motherboard. till then everything was working fine

Member Avatar for rproffitt

. When 2 parts that should work together don't then one of them is likely gone. In bad cases, both. Dead laptops are not easy to deal with since you need good spares to swap out the suspect part. That's not cheap and usually reserverved for use in repair depots.

At this point you go over the work again and see if you skipped something like and insulator mounting and hope.

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