Laptop won't show picture output

[blenderbender]

Hi Guys, i have an old Laptop lying around and wanted to tidy it up.

However if I power it up, it doesn't show any information on the screen. No bootup screen, no BIOS message/screen. Also the backlight of the display doesn't turn on, so it's just as black, as it is when it's powered off.

• The battery is fine and charges when I plug it in
• Keyboard backlight also lights up
• HDD spins up
• an external Monitor also doesn't show anything, hower if i plug in an HDMI cable, the external Monitor detects a HDMI input (HDMI1 popup at the bottom corner of the Monitor

The laptop I'm talking about is a lenovo y70-70 and has been sitting around without usage for about a year I guess.

It's got an integrated GPU i7 and a dedicated GPU. I doubt both of these could be defect?

I unplugged the battery and disposed of all statics by holding down the power button for 30s. I also reseated both the RAM sticks and checked if there were any obvious problems. like unplugged cables.

Any help is appreciated, thanks in advance

Stay healthy

[DoctorNick]

8 minutes ago, blenderbender said:

Hi Guys, i have an old Laptop lying around and wanted to tidy it up.

However if I power it up, it doesn't show any information on the screen. No bootup screen, no BIOS message/screen. Also the backlight of the display doesn't turn on, so it's just as black, as it is when it's powered off.

• The battery is fine and charges when I plug it in
• Keyboard backlight also lights up
• HDD spins up
• an external Monitor also doesn't show anything, hower if i plug in an HDMI cable, the external Monitor detects a HDMI input (HDMI1 popup at the bottom corner of the Monitor

The laptop I'm talking about is a lenovo y70-70 and has been sitting around without usage for about a year I guess.

It's got an integrated GPU i7 and a dedicated GPU. I doubt both of these could be defect?

I unplugged the battery and disposed of all statics by holding down the power button for 30s. I also reseated both the RAM sticks and checked if there were any obvious problems. like unplugged cables.

Any help is appreciated, thanks in advance

Stay healthy

Try unplugging the battery for like 10 min, you can also try powering it without battery and charger connected. You could try checking connection from screen to the motherboard. You can also try powering it up with a external display

[blenderbender]

32 minutes ago, DoctorNick said:

Try unplugging the battery for like 10 min, you can also try powering it without battery and charger connected. You could try checking connection from screen to the motherboard. You can also try powering it up with a external display

I already tried with an external Monitor. Which also displays nothing. I'll try it without the battery connected though, thanks.

 

Edit:

I left the battery disconnected for about 15 min or so and tried it with only the power adapter. But still nothing.

I plugged the battery back in now and I'm still having the problem (on external and laptop monitor)

Edited January 14, 2022 by blenderbender
Update

[blenderbender]

Well I think I found the problem (see pictures)

Any ideas what that is and if I can just solder it back on though?