1 long beep, 3 short beeps and "no signal" showing on monitor

[Reidybunch8]

Hi - I'm the dad of a 16 year old boy and have just bought him his first gaming PC. He started playing it yesterday and after a few hours the signal to the monitor just disappeared. Every time we switch the computer back on, the monitor shows about 5 seconds of boot-up image and then disappears again. It was an off-the-shelf purchase from Currys. We are absolute novices.... I've done some research on this forum and it seems like the specs of the computer are important to establish what could be wrong - so I've copied them below. We've established that it isn't the MSI monitor or the HDMI cable. Any help would be greatly appreciated. I can just take it back to the shop of course, but just wondering if there is an easier fix. Thank you for any assistance...

OVERVIEW​

Type
Gaming PC
Operating system
Windows 11 Home

PERFORMANCE​

Graphics card
- NVIDIA GeForce RTX 4060
- 8 GB GDDR6
RAM
- 16 GB DDR4 (3600 MHz)
- 128 GB maximum installable RAM
Processor
- AMD Ryzen 5 5500 Processor
- Hexa-core
- 3.6 GHz / 4.2 GHz
- 16 MB cache
Storage
1 TB SSD
Motherboard
ASUS PRIME A520M-A II

CONNECTIVITY​

WiFi
- WiFi 6
- 2x2
- Up to 2400 Mbps
Ethernet
Gigabit Ethernet port
Bluetooth
Bluetooth 5.3
Ports
- USB 3.2 x 4
- USB 2.0 x 2
- HDMI 2.1 x 1
- DisplayPort 1.4a x 3
- 3.5 mm jack x 3

MEDIA​

Disc drive
No
Memory card reader
No

FEATURES​

Keyboard
No
Mouse / trackpad
No
Other features
- ARGB lighting
- Tempered glass side panel
Cooling
PCS FrostFlow 100 ARGB V3 air cooler

SOUND​

Audio software
Realtek 7.1-Channel High Definition Audio CODEC

GENERAL​

Colour
Black
Weight
8.51 kg
Software
* Full version of Microsoft Office not included
* Full version of anti-virus / internet security not included

- Office 365 (30 day trial)
- Norton 360 (90 day trial)
Dimensions
415 x 210 x 400 mm (H x W x D)
Manufacturer’s guarantee
- 1 year parts
- 3 years labour
Box contents
- PCSpecialist Icon 240 Gaming PC (PCS-D2553668)
- Welcome pack
- Manual
- Driver discs
- AC power cable

 

[Scoped Badger]

The beep code suggests a graphics card issue, which would obviously fit in line with the lack of display.

It's possible the GPU has come loose in transit.

The first thing I would do is register the PC with PC Specialist. All you'll need to do is show them proof of purchase and they will give you access to an online account where you can access support etc.