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Daviddd
Paper Tape
Posts: 5
Registered: ‎05-25-2016
Location: UK
Views: 266
Message 1 of 7

G505 no display except non-blinking cursor

Hi. I fix laptops for a living and a customer came to me recently with a G505 that does nothing.

 

Switching it on, the display comes on, but that consists of a non-blinking cursor at the top left of the screen and nothing else. None of the function keys does anything. The cd drive clicks on start up, the indicator lights work fine and the hard drive works (it spins and is not damaged, I took it out and tested it) but there is no sign that anything is being read from it. The fan works, the CPU heats up but - nothing happens! It has Windows 8 installed and uses UEFI.

 

This laptop was manufactured in 2014, it's hardly been used and is in perfect condition. 

 

Has anyone ever seen this issue, I haven't managed to find anything anywhere about it. Any advice would be most welcome as I have run out of ideas! Thanks.

Sr Support Specialist
Posts: 7,237
Registered: ‎11-30-2015
Location: PH
Views: 226
Message 2 of 7

Re: G505 no display except non-blinking cursor

Hi Daviddd , 

 

Welcome to the Community Forums. 

 

Would you still be able to access BIOS , ideal if we can reset defaults ( to isolate if post is successful)? 

Cap lock and numlock are expected to be responding when pushed on/ off.

 

WIthout the harddrive , how is the display , would the power led stays solid on ?

Would the ram verified working on another laptop ?

Heatsinks and fan with appropriate thermal paste and contact ok ?

 

Update us how it goes with the laptop ? 

 

Regards



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Daviddd
Paper Tape
Posts: 5
Registered: ‎05-25-2016
Location: UK
Views: 222
Message 3 of 7

Re: G505 no display except non-blinking cursor

Hi Spidey, thanks for replying.

 

No, the only thing that ever displays is the solitary, non-blinking cursor at the top left. The power light and charging light come on but none of the keys works in any fashion, I've tried them all! Definitely no sign of a BIOS screen at all.

 

I have re-assembled it all after reseating the CPU with new thermal paste and I made sure the heatsink and fan are clean.

 

This is what I find so odd, usually the BIOS will appear in some form if only to tell you it's not well! The CPU heats up and the fan responds to that. 

 

It's like there is no data being transferred to the display. The stationary cursor is not something I've seen before and I've been at it a long time.

 

I can't do much more with it, I've tried everything I can think of!!

Daviddd
Paper Tape
Posts: 5
Registered: ‎05-25-2016
Location: UK
Views: 221
Message 4 of 7

Re: G505 no display except non-blinking cursor

Oh yes, I tested the RAM with identical working modules - still nothing.

Sr Support Specialist
Posts: 7,237
Registered: ‎11-30-2015
Location: PH
Views: 217
Message 5 of 7

Re: G505 no display except non-blinking cursor

Hi Daviddd , 

 

As what you already have isolated , we know power is received but at the moment would not complete P.O.S.T. 

A good indication of a successful power on self test is with the machine able to provide a working BIOS screen which we do not have and likewise a responding cap and num lock keys. 

 

POST process ended with the GPU integrity and since both CPU and GPU are integrated within the systemboard, most likely it would end up with a board replacement having RAMs , harddrive , fans verified working . 

 

I think you are already have this idea right now and just needing a comparative evaluation of this.

 

You may call in tech support for probable depot repair and / or parts pricing and availability . 

 

Hope our answer helped in some ways to decide for your client on how to proceed. 

 

Regards



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Daviddd
Paper Tape
Posts: 5
Registered: ‎05-25-2016
Location: UK
Views: 213
Message 6 of 7

Re: G505 no display except non-blinking cursor

Thanks again, yes I agree with you. But it's strange that other functions of the motherboard are working fine. Usually if it fails, there's nothing working at all.

 

I don't think the customer would be interested in repairing it, as he bought it second-hand anyway quite cheaply. The motherboard would likely cost more than he paid for it!

 

Cheers.

Sr Support Specialist
Posts: 7,237
Registered: ‎11-30-2015
Location: PH
Views: 210
Message 7 of 7

Re: G505 no display except non-blinking cursor

Hi Daviddd , 

 

Have had this solid power on with or without blinking cursor even without the harddrive to boot . 

Worked on a service shop with reball machine / rework that helped in some cases just to survive the board but that alone just gave approximate 6 months functionality . 

 

Hope we have more avenues to explore but for a soldered chip (GPU/ CPU) all ends with boards as permanent fix.

 

Regards

 



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